Geometry Formulas

Searching on the internet for geometry formulas? Look no further! The Geometry Formula Sheet contains a complete list of the most common geometry formulas, postulates, and theorems. It is comprehensive yet concise. No matter if you are taking a geometry course or studying for a standardized test, the Geometry Formula sheet can help you systematize your knowledge of geometry and equip you with the necessary geometry formulas to tackle difficult geometry problems and proofs.

Geometry Formula Sheet Features

Logically organizes geometry formulas, postulates, and theorems from a bird's-eye view
Written in straight-to-the-point, east-to-understand language within only 5 pages
Includes shortcut formulas derived from theorems and properties
Explains key relationships between different geometric figures

Geometry Formulas Covered

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Points & Lines

Points
Lines, Segments, and Rays
- Lines
- Collinear Points
- Noncollinear Points
- Line Segments
- Rays

Angles

Measure of Angles
- Conversion between Radians and Degrees
Types of Angles
- Acute Angle
- Right Angle
- Straight Angle
- Obtuse Angle
Angle Pairs
- Adjacent Angles
- Vertical Angles
- Complementary Angles
- Supplementary Angles
Perpendicular Lines
Parallel Lines
- Alternate Interior Angle Pairs
- Corresponding Angle Pairs
- Alternate Exterior Angle Pairs
- Supplementary Interior Angle Pairs
- Proving Two Lines are Parallel

Triangles

Properties
- Interior Angles
- Triangle Inequality
- Greater Angle Opposite Longer Side
- Height
- Area
- Heron's Formula
- Median
- Exterior Angle
Isosceles Triangles
- Properties
Equilateral Triangles
- Properties
- Height
- Area
Right Triangles
- Properties
- Pythagorean Theorem
- Converse of Pythagorean Theorem
- Special Right Triangles
Congruent Triangles
Similar Triangles
- Ratio of the Areas
- Right Triangle Similarity
- Midpoints of a Triangle

Quadrilaterals

Properties
Trapezoid
- Height
- Median
- Area
- Isosceles Trapezoid
Parallelogram
- Height
- Properties
- Area
Rhombus
- Properties
- Area
- Perimeter
Rectangle
- Area
- Perimeter
Square
- Properties
- Area
- Perimeter

Polygons

Properties
- Diagonal
- Interior Angles
- Exterior Angles
Classifying Polygons
- By Shape
- By Number of Sides
Special Polygons
- Equiangular Polygon
- Equilateral Polygon
- Regular Polygon
- Center of a Regular Polygon
- Apothem
- Perimeter
- Area

Circles

Properties
- Perimeter
- Area
Arcs
- Central Angle
- Arc Length & Area Sector
- Inscribed Angles
- Inscribed Right Angles
- Congruent Inscribed Angles
Chords
- Diameter Perpendicular Chord
- Congruent Chords
- Parallel Chords
- Intersecting Chords
Secants and Tangents
- Chord-Tangent Angle Theorem
- Secant-Secant, Secant-Tangent, Tangent-Tangent Angle Theorem
- Secant-Secant Segment Products
- Tangent-Secant Segment Products
- Congruent Tangent Segments
Circles and Polygons
- Isosceles Triangles inside a Circle
- Inscribed Polygons
- Inscribed Quadrilateral
- Circumscribed Polygons

Coordinate Geometry

Distance and Midpoint Formulas
Line Equation
- Rough Directions of the Slopes
- Finding the Equation of a Line
- Intersects
- Perpendicular Lines
- Parallel Lines
Reflections
- Point Reflections
- Line Reflections
Circle Equation