Formal proofs present the oh-so-mathematical evidence in two columns: one for the statement they are claiming is true, and the other for the reasoning behind them.

Up Next:

Volumes of Prisms and Cylinders

Secant Angles

Area of a Sector

Volumes of Pyramids and Cones

Complementary and Supplementary Angles

Translations and Functions

Law of Cosines

Characteristics of Parallelograms

Surface Area of a Cube

Verifying Trig Identities

Special Right Triangles

Inscribed Angles

Lines, Segments and Rays

Proving Lines are Parallel

Cubes: Surface Area and Volume

Constructions

Proving Triangles Congruent 2

Finding the Distance Between Two Points

Transformations

Linear Pairs

Proving Lines are Perpendicular

Centers of a Triangle

Volumen de un Cubo

SAS, ASA, AAS

Proving Triangles Congruent

Exterior and Remote Interior Angles

Perimeter of Irregular Shapes

Equations of Circles

Polygons

Angles

Coordinate Geometry

Triangle Inequality Theorem

Law of Sines

Introduction to 3D Geometry

Cosines

Surface Area of Cylinders

Geometric Word Problems

Collinearity

Tangent Half-Angle Formula

A Midsummer Night's Dream

Area Formulas

SOHCAHTOA

Transformaciones

Coordinates and Distance Formula

Converting Between Degrees and Radians

Perimeter and Circumference

Vertical Angle Theorem

Perimeter of a Rectangle

Sines

ACT Math 2.2 Coordinate Geometry

Angles of a Polygon

Midsegment Theorem

Rhombi

Area

Triangles

Similar Figures

Attributes of Circles

Volume

SSS Postulate

Slopes of Parallel and Perpendicular Lines

The Tangent Function

Solving Trigonometric Equations

Area of an Irregular Shape

30-60-90 Triangle

Parallel Lines and Transversals

Properties of Equality and Congruence