Razon

Obtuse Triangle

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Razon

Razon
Contributing
Usage
Astronomy
Astronomy
Chemistry
Chemistry
- Electrical Conductivity
- Semiconductor Doping
Computer Science
Computer Science
- Instruction Set Architectures
- Caching
  Caching
- Cryptography
  Cryptography
  - The Shift Cipher
  - Introduction
  - Hash Functions
    Hash Functions
    
    Introduction
    
    The Davies-Meyer Transform
    
    Introduction
    
    Introduction
    
    Collisions
  - Integrity Verification
    Integrity Verification
    
    Index
    
    Introduction
  - Key Management
    Key Management
    
    Index
    
    Key Exchange
    Key Exchange
    
    Index
    
    Introduction
    
    Introduction
  - Primitives
    Primitives
    
    Introduction
    
    Pseudorandom Functions
    
    Introduction
    
    Pseudorandom Permutations
  - Private Key Cryptography
    Private Key Cryptography
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Block Ciphers
    Block Ciphers
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Modes of Operation
    Modes of Operation
    
    Introduction
    
    The Cipher Block Chaining (CBC) Mode
    
    The Counter (CTR) Mode
    
    Introduction
    
    Message Authentication Codes (MACs)
    Message Authentication Codes (MACs)
    
    Introduction
    
    Fixed-Length MACs
    
    Hash-Based MACs (HMAC)
    
    Security Definitions
    Security Definitions
    
    Introduction
    
    Introduction
    
    Chosen Plaintext Attack (CPA)
    
    Ciphertext Integrity (CI)
    
    Introduction
    
    Ciphertext Only Attack (COA)
    Ciphertext Only Attack (COA)
    
    Introduction
    
    Introduction
    
    Introduction
    
    Stream Ciphers
    Stream Ciphers
    
    Introduction
    
    Hardware Oriented Stream Ciphers
    Hardware Oriented Stream Ciphers
    
    Introduction
  - Public Key Cryptography
    Public Key Cryptography
    
    Introduction
    
    Security Definitions
    Security Definitions
    
    Index
    
    Introduction
- Cybersecurity
  Cybersecurity
  - Exploitation
    Exploitation
    
    Index
    
    Binary Exploitation
    Binary Exploitation
    
    Index
    
    Heap Exploitation
    Heap Exploitation
    
    Heap Exploitation
    
    Introduction
    
    Stack Exploitation
    Stack Exploitation
    
    Stack Exploitation
    
    Introduction
    
    Introduction
    
    Stack Canaries
    
    Introduction
    
    Introduction
    
    Sigreturn-Oriented Programming (SROP)
    
    DNS
    DNS
    
    Index
    
    Introduction
    
    What is DNS Traffic Amplification?
    
    Web
    Web
    
    Index
    
    Overview
    
    Command Injection
    
    Overview
    
    Cross-Site Scripting
    
    Directory Traversal
    
    File Inclusion vs Directory Traversal
    
    File Upload Vulnerability
    
    Overview
    
    Introduction
    
    Introduction
    
    Overview
    
    Introduction
    
    Overview
    
    SQL Injection
    SQL Injection
    
    Overview
    
    Introduction
    
    Introduction
  - Hardware Hacking
    Hardware Hacking
    
    Hardware Hacking
    
    Wireless Attacks
    Wireless Attacks
    
    Wireless Attacks
    
    Introduction
    
    Introduction
    
    Introduction
  - Post Exploitation
    Post Exploitation
    
    Index
    
    Active Directory (AD)
    Active Directory (AD)
    
    Index
    
    Overview
    
    Overview
    
    Enumeration
    Enumeration
    
    Index
    
    Linux
    Linux
    
    Introduction
    
    Hunting Down Sensitive Files
    
    List Network Interfaces and Network Information
    
    Introduction
    
    User Enumeration
    
    Windows
    Windows
    
    Introduction
    
    System Enumeration
    
    Pivoting
    Pivoting
    
    Introduction
    
    Introduction
    
    Introduction
    
    Privilege Escalation
    Privilege Escalation
    
    Index
    
    Linux
    Linux
    
    Methodology
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Windows
    Windows
    
    Methodology
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Misconfigured Services
    Misconfigured Services
    
    Introduction
    
    Introduction
    
    Insecure Service Permissions
    
    Unquoted Service Paths
    
    Weak Registry Permissions
  - Reconnaissance
    Reconnaissance
    
    Index
    
    Enumeration
    Enumeration
    
    Overview
    
    Enumerating BIND servers with CHAOS
    
    Introduction
    
    Introduction
    
    Introduction
    
    Obtaining Version Information
    
    Port Scanning
    Port Scanning
    
    Introduction
    
    Overview
    
    Decoy Scans
    
    SYN Scan
    
    TCP Connect Scan
    
    Vulnerability Scanning
    Vulnerability Scanning
    
    Index
    
    Introduction
    
    Open Source Intelligence (OSINT)
    Open Source Intelligence (OSINT)
    
    Introduction
    
    Using whois for gathering domain name and IP address information
    
    Introduction
    
    Grabbing E-Mails from Google using goog-mail.py
    
    Introduction
    
    Introduction
  - Reverse Engineering
    Reverse Engineering
    
    Reverse Engineering
    
    Introduction
    
    Assembly Programming
    Assembly Programming
    
    Introduction
    
    X86 64
    X86 64
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Endianness
    
    Introduction
    
    Introduction
    
    Binary Formats
    Binary Formats
    
    Index
    
    ELF
    ELF
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    PE
    PE
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Program Anatomy
    Program Anatomy
    
    Program Anatomy
    
    Registers
    
    The Heap
    
    The Stack
- Data Representation
  Data Representation
- Networking
  Networking
  - Introduction
  - VLANS
  - Application Layer Addressing
    Application Layer Addressing
    
    Uniform Resource Locators (URLs)
    Uniform Resource Locators (URLs)
    
    URL Encoding
  - Protocols
    Protocols
    
    Ethernet
    
    Introduction
    
    Introduction
    
    Introduction
    
    Server Message Block (SMB)
    
    Introduction
    
    Address Resolution Protocol (ARP)
    Address Resolution Protocol (ARP)
    
    Introduction
    
    Introduction
    
    ARP Message Format
    
    Introduction
    
    The Address Resolution Process
    
    Introduction
    
    Domain Name System (DNS)
    Domain Name System (DNS)
    
    DNS
    
    Introduction
    
    The in addr.arpa Domain
    
    Hypertext Transfer Protocol (HTTP)
    Hypertext Transfer Protocol (HTTP)
    
    Introduction
    
    HTTP Requests
    HTTP Requests
    
    Format
    
    Introduction
    
    Internet Protocol (IP)
    Internet Protocol (IP)
    
    Internet Protocol (IP)
    
    Internet Protocol v4 (IPv4)
    Internet Protocol v4 (IPv4)
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    WLAN (IEEE 802.11)
    WLAN (IEEE 802.11)
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Management Frames
    Management Frames
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
  - The TCP IP Suite and the OSI Model
    The TCP IP Suite and the OSI Model
    
    The OSI Model
    
    Introduction
    
    Introduction
- Numerical Analysis
  Numerical Analysis
  - Newton's Method
- Programming
  Programming
  - Programming
  - Programming Language Theory
    Programming Language Theory
    
    Operators
  - Programming in Assembly
    Programming in Assembly
    
    Assembly
  - Programming in C
    Programming in C
    
    Command-Line Arguments
    
    Compilation
    
    Control Flow
    
    Functions
    
    Input and Output
    
    Operators
    
    Statements
    
    The C Programming Language
    
    Variables
    
    Data Types
    Data Types
    
    Arrays
    
    Boolean
    
    Casting
    
    Characters
    
    Data Types
    
    Enums
    
    Floating-Point Numbers
    
    Integers
    
    Pointers
    
    Strings
    
    Structures
- Quantum Computing
  Quantum Computing
- System Internals
  System Internals
  - Shells
  - Linux
    Linux
    
    Linux
    
    Bourne-Again Shell (bash)
    
    File System
    
    Groups
    
    Users
  - Windows
    Windows
    
    New Technology File System (NTFS)
    
    Active Directory (AD)
    Active Directory (AD)
    
    Introduction
    
    Domain Controller
    
    Introduction
    
    Objects
    
    The Directory Information Tree (DIT)
    
    Schema
    Schema
    
    The Active Directory Schema
    
    Attributes
    
    Classes
    
    Default Schema
    Default Schema
    
    Index
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    Introduction
    
    PowerShell
    PowerShell
    
    Execution Policies
    
    PowerShell Drives (PSDrives)
    
    What is PowerShell?
    
    Variables in PowerShell
    
    Commands
    Commands
    
    Introduction
- Theoretical Computer Science
  Theoretical Computer Science
Eisodos
Eisodos
- Welcome to Eisodos!
Electrical Engineering
Electrical Engineering
- Current
- Electronic Circuits
- Kirchhoff's Laws
- Analog Circuits
  Analog Circuits
  - Analog Circuits
  - Arithmetic Circuits
  - Capacitors
  - Circulators
  - Inductors
  - MOS Capacitors
  - Norators
  - Nullators
  - Resistors
  - Sources
  - Switches
  - Amplifiers
    Amplifiers
    
    Amplifiers
    
    Differential Voltage Amplifiers
    
    Operational Amplifiers
    
    Voltage Followers
  - Diodes
    Diodes
    
    Diodes
    
    Ideal Diodes
  - Immittance Converters
    Immittance Converters
    
    Gyrators
    
    Immittance Converters
    
    Negative Immittance Converters
    
    Transformers
  - Transistors
    Transistors
    
    MOSFET
    
    Transistors
- Digital Circuits
  Digital Circuits
  - Adders
  - CMOS
  - Circuit Timing
  - Circuit Triggering
  - Combinational Circuits
  - Comparators
  - Demultiplexers
  - Introduction
  - Dividers
  - Flip-Flops
  - Latches
  - Multiplexers
  - Multipliers
  - Pipelining
  - Registers
  - Sequential Circuits
  - Barrel Shifters
  - Subtractors
  - Logic Gates
    Logic Gates
    
    AND Gates
    
    Inverters
    
    Logic Gates
    
    NAND Gates
    
    NOR Gates
    
    OR Gates
    
    XOR Gates
- Network Analysis
  Network Analysis
  - Affine Multiports
  - Electrical Elements
  - Fundamental Circuit Variables
  - Linear Multiports
  - Linear Networks
  - Lumped Circuits
  - Multiports
  - Network Analysis
  - Network Graphs
  - Networks
  - Reference Directions
  - The Substitution Theorem
  - Thévenin and Norton Equivalents
  - Analysis Techniques
    Analysis Techniques
    
    Fundamental Loop and Cut-Set Analysis
    
    Load Line Analysis
    
    Mesh Current Analysis
    
    Node-Voltage Analysis
    
    Small-Signal Analysis
    
    Tableau Analysis
  - One Ports
    One Ports
    
    Linear One-Ports
    
    One-Port Interconnections
    
    One-Port Linearity
    
    One-Ports
    
    Open Circuits
    
    Short Circuit
  - Two Ports
    Two Ports
    
    Affine Two-Ports
    
    Linear Two-Ports
    
    Nullors
    
    Two-Port Interconnections
    
    Two-Ports
- Signals
  Signals
  - Signals
  - Sinusoidal Signals
Languages
Languages
- Cyrillic Script
- Ancient Greek
  Ancient Greek
- Arabic
  Arabic
- Bulgarian
  Bulgarian
  - Bulgarian
  - Adjectives
  - Definiteness
  - Nouns
  - Orthography and Phonology
  - Pronouns
  - Verbs
  - Spelling
    Spelling
    
    Capitalisation
    
    Compound Adverbs
    
    Spelling of Compound Nouns
    
    Spelling Particles
- English
  English
  - English
- German
  German
- Japanese
  Japanese
- Latin
  Latin
- Modern Greek
  Modern Greek
  - Modern Greek
  - Adjectives
  - Adverbs
  - Definiteness
  - Nouns
  - Numerals
  - Orthography and Phonology
  - Prepositions
  - Pronouns
  - Syntax
  - Verbs
  - Syntax
    Syntax
    
    Noun Phrases
- Serbo Croatian
  Serbo Croatian
- Spanish
  Spanish
Linguistics
Linguistics
- Introduction
- Writing Systems
- Phonetics
  Phonetics
Mathematics
Mathematics
- Mathematics
- Algebra
  Algebra
  - Modular Arithmetic
  - Monoids
  - The Dual Numbers
  - The Extended Real Numbers
  - Boolean Algebra
    Boolean Algebra
    
    Boolean Algebra
    
    Boolean Expressions
    
    Boolean Functions
    
    Conjunction
    
    Disjunction
    
    Exclusive Disjunction
    
    Implicants
    
    Implicates
    
    Karnaugh Maps
    
    Logic Optimization
    
    Negation
    
    Operator Laws
    
    Parity Function
    
    Truth Tables
  - Equations
    Equations
    
    Equations
    
    Differential Equations
    Differential Equations
    
    Differential Equations
    
    Ordinary Differential Equations
    Ordinary Differential Equations
    
    Autonomous Systems of ODEs
    
    Initial Value Problems
    
    Linear ODEs
    
    Linear Systems of ODEs
    
    Lipschitz Conditions
    
    Ordinary Differential Equations
    
    Separable ODEs
    
    Systems of ODEs
    
    Polynomial Equations
    Polynomial Equations
    
    Complex Polynomial Equations
    
    Polynomial Equations
    
    Real Polynomial Equations
    
    Trigonometric Equations
    Trigonometric Equations
    
    Real Trigonometric Equations
  - Fields
    Fields
    
    Fields
    
    The Complex Numbers
    The Complex Numbers
    
    Complex Numbers
    
    Complex Polynomials
    
    Parallel Sum
    
    The Binomial Theorem
    
    The Extended Complex Numbers
    
    The Real Numbers
    The Real Numbers
    
    Positional Numeral Systems
    
    Real Polynomials
    
    The Real Numbers
  - Groups
    Groups
    
    Abelian Groups
    
    Direct Product
    
    Groups
    
    Subgroups
  - Inequalities
    Inequalities
    
    Inequalities
    
    Logarithmic Inequalities
  - Linear Algebra
    Linear Algebra
    
    Complex Vectors
    Complex Vectors
    
    Complex Dot Product
    
    Complex Vectors
    
    Matrices
    Matrices
    
    Elementary Matrix Operations
    
    Kronecker Product
    
    Matrices
    
    Matrix Norms
    
    Matrix Operations
    
    Matrix Product
    
    Matrix Rank
    
    Matrix Transposition
    
    Row and Column Vectors
    
    Spectral Norm
    
    Complex Matrices
    Complex Matrices
    
    Complex Matrices
    
    Hermitian Transpose
    
    Schur Decomposition
    
    Singular Value Decomposition
    
    Unitary Matrices
    
    Real Matrices
    Real Matrices
    
    Frobenius Norm
    
    Orthogonal Matrices
    
    Real Matrices
    
    Real Symmetric Matrices
    
    Singular Values
    
    Square Matrices
    Square Matrices
    
    Determinants
    
    Diagonal Matrices
    
    Eigendecomposition
    
    Eigentheory
    
    Matrix Invertibility
    
    Matrix Similarity
    
    Skew-Symmetric Matrices
    
    Square Matrices
    
    Symmetric Matrices
    
    Trace
    
    Triangular Matrices
    
    Real Vectors
    Real Vectors
    
    Cross Product
    
    Dot Product
    
    Maximum Norm
    
    P-Norms
    
    Real Vectors
    
    Systems of Linear Equations
    Systems of Linear Equations
    
    Row Echelon Forms
    
    Systems of Linear Equations
    
    Vector Spaces
    Vector Spaces
    
    Bases
    
    Linear Combinations
    
    Linear Subspaces
    
    Norms
    
    Span
    
    Vector Spaces
    
    Inner Product Spaces
    Inner Product Spaces
    
    Inner Product Spaces
    
    Orthogonal Complements
    
    Orthogonal Projections
  - Rings
    Rings
    
    Polynomials
    
    Rings
    
    Rngs
- Analysis
  Analysis
  - Analysis
  - Analysis on Manifolds
    Analysis on Manifolds
    
    Coordinate Representations
    
    Differentiable Manifolds
  - Complex Analysis
    Complex Analysis
    
    Boundedness of Complex Functions
    
    Complex Power Series
    
    Complex Sequences
    
    Complex Series
    
    Complex-Valued Function
    
    Topology of the Complex Plane
    
    Complex Functions
    Complex Functions
    
    Complex Analytic Functions
    
    The Complex Exponential Function
    
    Complex Functions
    
    The Complex Natural Logarithm
    
    Continuity of Complex Functions
    
    Differentiation of Complex Functions
    
    Limits of Complex Functions
    
    Periodicity of Complex Functions
  - Functional Analysis
    Functional Analysis
    
    Linearity
    Linearity
    
    Algebraic Adjoints
    
    Alternating Multilinear Forms
    
    Linear Transformations
    
    Multilinear Forms
    
    Multilinear Transformations
    
    Symmetric Multilinear Forms
    
    The General Linear Group
    
    Vector Space Endomorphisms
    Vector Space Endomorphisms
    
    Determinants
    
    Eigentheory
    
    Orthogonal Transformations
    
    The Orthogonal Group
    
    The Special Orthogonal Group
    
    The Special Unitary Group
    
    The Unitary Group
    
    Unitary Transformations
    
    Vector Space Automorphisms
    
    Vector Space Endomorphisms
    
    Matrix Functions
    Matrix Functions
    
    Analytic Matrix Functions
    
    Matrix Exponentiation
    
    Matrix Functions
    
    Matrix Power Series
    
    Matrix Sequences
    
    Matrix Series
    
    Sequences
    Sequences
    
    Convergence of Sequences
    
    Sequences
  - Functions
    Functions
    
    Bijections
    
    Functions
    
    Injections, Surjections and Bijections
    
    Injections
    
    Kronecker Delta
  - Real Analysis
    Real Analysis
    
    Bachmann-Landau Notation
    
    Boundedness (Real-Valued Functions)
    
    Measure-Theoretic Integration
    
    Real Power Series
    
    Real Sequences
    
    Real Series
    
    Real Vector Sequences
    
    Real Vector-Valued Functions
    
    Real-Valued Functions
    
    Euclidean Space
    Euclidean Space
    
    Cartesian Coordinate System
    
    Coordinate Systems for Euclidean Space
    
    Coordinate Transformations
    
    Cylindrical Coordinates
    
    The Topology of Euclidean Space
    
    Local Coordinate Bases
    
    Polar Coordinates
    
    Spherical Coordinates
    
    Real Functions
    Real Functions
    
    Antidifferentiability (Real Functions)
    
    Boundedness of Real Functions
    
    Concavity and Convexity of Real Functions
    
    Continuity (Real Functions)
    
    Differentiability (Real Functions)
    
    Extrema of Real Functions
    
    Limits (Real Functions)
    
    Monotonicity of Real Functions
    
    Parity
    
    Periodicity
    
    Real Analytic Functions
    
    Real Exponentiation
    
    Real Functions
    
    Real Logarithms
    
    Real Polynomial Functions
    
    Real Rational Functions
    
    Taylor Series
    
    Integration
    Integration
    
    Cauchy Principal Value
    
    Lebesgue Integrals of Real Functions
    
    Riemann Integrals of Real Functions
    
    Real Trigonometric Functions
    Real Trigonometric Functions
    
    Inverse Real Trigonometric Functions
    
    Real Trigonometric Functions
    
    Trigonometric Properties
    
    Real Parametric Curves
    Real Parametric Curves
    
    Arclength
    
    Continuity (Real Parametric Curves)
    
    Curvature
    
    Frenet-Serret Bases
    
    Limits of Parametric Curves
    
    Parametric Curves
    
    Differentiation
    Differentiation
    
    Antidifferentiability (Real Parametric Curves)
    
    Differentiability (Real Parametric Curves)
    
    Real Parametric Surfaces
    Real Parametric Surfaces
    
    Area (Real Parametric Surfaces)
    
    Real Parametric Surfaces
    
    Differentiation
    Differentiation
    
    Smoothness of Parametric Surfaces
    
    Normal Vectors (Real Parametric Surfaces)
    
    Tangent Planes (Real Parametric Surfaces)
    
    Real Scalar Fields
    Real Scalar Fields
    
    Continuity (Real Scalar Fields)
    
    Extrema (Real Scalar Fields)
    
    Limits (Real Scalar Fields)
    
    Optimization Problems
    
    Real Scalar Fields
    
    Taylor Expansion (Real Scalar Fields)
    
    Differentiation
    Differentiation
    
    Directional Differentiability (Real Scalar Fields)
    
    Gradient
    
    Hessian Matrix
    
    Laplacian (Real Scalar Fields)
    
    Partial Antidifferentiability (Real Scalar Fields)
    
    Partial Differentiability (Real Scalar Fields)
    
    Total Differentiability (Real Scalar Fields)
    
    Integration
    Integration
    
    Lebesgue Integrals (Real Scalar Fields)
    
    Line Integrals (Real Scalar Fields)
    
    Multidimensional Integrals (Real Scalar Fields)
    
    Parametric Integrals
    
    Riemann Integrals (Real Scalar Fields)
    
    Surface Integrals (Real Scalar Fields)
    
    Real Vector Fields
    Real Vector Fields
    
    Conservative Vector Fields
    
    Real Vector Fields
    
    Differentiation
    Differentiation
    
    Curl (Real Vector Fields)
    
    Divergence (Real Vector Fields)
    
    Inverse Function Theorem
    
    Integration
    Integration
    
    Integration of Real Vector Fields
    
    Line Integrals (Real Vector Fields)
    
    Surface Integrals (Real Vector Fields)
    
    Real Vector Functions
    Real Vector Functions
    
    Continuity (Real Vector Functions)
    
    Implicit Functions
    
    Integration of Real Vector Functions
    
    Limits (Real Vector Functions)
    
    Real Vector Functions
    
    Reparametrization
    
    Differentiation
    Differentiation
    
    Directional Differentiability (Real Vector Functions)
    
    Jacobian Matrix
    
    Partial Differentiability (Real Vector Functions)
    
    Tangent Space (Real Vector Functions)
    
    Total Differentiability (Real Vector Functions)
- Category Theory
  Category Theory
  - Category Theory
  - Categories
- Combinatorics
  Combinatorics
- Geometry
  Geometry
  - General Regions in 2D
  - Euclidean Geometry
    Euclidean Geometry
    
    Centroid
    
    Euclidean Geometry
    
    Congruence
    
    Angles
    Angles
    
    Plane Angles
    Plane Angles
    
    Angle Bisector of a Plane Angle
    
    Measure of a Plane Angle
    
    Plane Angle
    
    Curves
    Curves
    
    Curves
    
    Parametrization
    
    Straight Lines
    Straight Lines
    
    Angle between Lines
    
    Concurrent Lines
    
    Line Segments
    
    Parametric Equation of a Line
    
    Straight Lines
    
    Euclidean Space
    Euclidean Space
    
    Half-Spaces
    
    Planimetry
    Planimetry
    
    Line Intersections in a Plane
    
    Planimetry
    
    Plane Curves
    Plane Curves
    
    Plane Curves
    
    Ellipse
    
    Hyperbola
    
    Parabola
    
    Circles
    Circles
    
    Angles in a Circle
    
    Chords in a Circle
    
    Circles
    
    Configurations of Lines and Circles
    
    Polygons
    Polygons
    
    Perimeter
    
    Tangential Polygons
    
    Convex Polygons
    Convex Polygons
    
    Cyclic Polygon
    
    Cyclic Polygons
    Cyclic Polygons
    
    Cyclic Polygon
    
    Triangles
    Triangles
    
    Acute Triangle
    
    Cyclicity of Triangles
    
    Obtuse Triangle
    
    Right Triangles
    
    Triangles
    
    Cevians
    Cevians
    
    Altitudes
    
    Angle Bisectors
    
    Cevians
    
    Medians
    
    Isosceles Triangles
    Isosceles Triangles
    
    Isosceles Triangles
    
    Stereometry
    Stereometry
    
    Lines and Planes in 3D
    
    Planes in 3D
    
    Stereometry
    
    Straight Lines in 3D
    
    Surfaces
    Surfaces
    
    Closed Surfaces
    
    Parametrization
    
    Planes
    
    Surfaces
  - Manifolds
    Manifolds
    
    Coordinate Systems
    Coordinate Systems
    
    Atlas
    
    Charts
    
    Transition Maps
- Graph Theory
  Graph Theory
  - Graph Theory
  - Directed Graphs
  - Directed Multigraphs
    Directed Multigraphs
    
    Cuts
    
    Cyclicity
    
    Directed Multigraphs
    
    Planarity
  - Undirected Graphs
    Undirected Graphs
    
    Cyclicity
    
    Trees
    
    Graphs
  - Undirected Multigraphs
    Undirected Multigraphs
    
    Cuts
    
    Undirected Multigraphs
- Logic
  Logic
- Measure Theory
  Measure Theory
- Set Theory
  Set Theory
  - Cardinality
  - Collections
  - Covers
  - Index Sets
  - Intersections
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euclidean-geometry geometry mathematics planimetry polygons triangles

Obtuse Triangle

Definition: Obtuse Triangle

A [[Triangles|triangle]] is obtuse iff one of its [[Polygons|interior angles]] is greater than \(\frac{\pi}{2}\) (\(90^\degree\)).

April 3, 2026 April 3, 2026

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