Geometry Dictionary
- A
- Acute Angle
- Adjacent Angles
- Alternate Exterior Angles
- Alternate Interior Angles
- Altitude of a Triangle
- Angle
- Acute
- Adjacent
- Alternate Exterior
- Alternate Interior
- between Line and Plane
- between Two Lines
- between Two Lines (3D)
- between Two Planes
- between Two Vectors
- Bisector
- Complementary
- Congruent
- Corresponding
- Dihedral
- Exterior
- Interior
- Negative
- Opposite
- Polyhedral
- Reflex
- Regular Polygon
- Polyhedral
- Right
- Straight
- Supplementary
- Triangle
- Angle Bisector
- Annulus
- Apothem
- Arc Length
- Arc of a Circle
- Arccosine
- Arcsine
- Arctangent
- Area
- B
- C
- Cartesian Equations of a Line
- Cartesian Equation of a Plane
- Catheti
- Center
- Centroid
- Centroid Coordinates
- Chord
- Circle
- Circle Equation
- Circle-Line Intersection
- Circular Sector
- Circular Trapezoid
- Circumcenter
- Circumference
- Cofunction Identities
- Circumscribed Polygon
- Collinear
- Coplanar
- Complementary Angles
- Concave Polygon
- Concave Polyhedron
- Cone
- Congruent Angles
- Conic Sections
- Convex Polygons
- Convex Polyhedron
- Corresponding Angles
- Cosecant
- Cosecant Function
- Cosine
- Cosine of 30º
- Cosine of 45º
- Cosine of 60º
- Cosine Function
- Cosine Law
- Cotangent
- Cotangent Function
- Cross Product
- Cylinder
- D
- E
- F
- G
- H
- I
- J
- K
- L
- M
- N
- O
- P
- Parabola
- Parallel
- Parallelepiped
- Parallelograms
- Parametric Line Equations
- Parametric Plane Equations
- Pentadecagon
- Pentagon
- Pentagonal Prism
- Pentagonal Pyramid
- Pentahedron
- Perimeter
- Periodicity Identities
- Perpendicular
- Perpendicular Bisector
- Perpendicular Bisector Equation
- Perpendicular Line
- Plane
- Plane Equations
- Platonic Solids
- Point-Line Distance
- Point-Slope Equation
- Points
- Polar Coordinates
- Polygon
- Polygon Diagonals
- Polyhedra
- Prism
- Product to Sum Identities
- Properties of a Triangle
- Pyramid
- Pythagorean Identities
- Pythagorean Theorem
- Q
- R
- S
- Scalar Multiplication
- Scalar Projection
- Secant
- Secant Function
- Segment of a Circle
- Semicircle
- Sheaf of Planes
- Similar Polygons
- Similar Right Triangles
- Simultaneous Trigonometric Equations
- Sine
- Sine of 30º
- Sine of 45º
- Sine of 60º
- Sine Function
- Sine Law
- Slant Height
- Slope
- Slope-Intercept Equation
- Sphere
- Spherical Cap
- Spherical Lune
- Spherical Segment
- Spherical Wedge
- Square
- Square Prism
- Square Pyramid
- Straight Angle
- Sum and Difference Identities
- Sum to Product Identities
- Surface Area
- Supplementary Angles
- Symmetric Point
- T
- Tangent
- Tangent of 30º
- Tangent of 45º
- Tangent of 60º
- Double Angle Tangent
- Tangent Function
- Tetradecagon
- Tetrahedron
- Trapezoid
- Triangle
- Triangular Prism
- Triangular Pyramid
- Tridecagon
- Trigonometric Table
- Trigonometric Equations
- Trigonometric Functions
- Trigonometric Identities
- Trigonometric Ratios
- Triple Product
- Truncated Cone
- Truncated Pyramid
- Two-Point Form
- Types of Polygons
- Types of Polyhedra
- Types of Prisms
- Types of Pyramids
- Types of Triangles
- U
- V
- W
- X
- Y
- Z
