Geometry A - Lessons Help

Lines

Definitions from Undefined Terms

Introduction to Constructions: (See the Projects Help Page)

Conditional Statements

Introduction to Proofs

Define transformations

Transformations and Symmetry

Transformations and Congruence

Prove Triangles Congruent Using Side Lengths

Side-Angle-Side Triangle Congruence

Angle-Side-Angle Triangle Congruence

Angles and Parallel Lines

Angles in Triangles

Perpendicular Bisectors

Segments in Triangles

More Triangle Congruence

Properties of Parallelograms

Prove a Figure is a Parallelogram

Special Parallelograms

Dilations

Similarity

Prove Similarity in Triangles Using Angles

Prove Similarity in Triangles Using Sides

Proportions in Triangles

Similarity and Proportions

Pythagorean Theorem and Similarity

Relationships between Ratios

Problem Solving with Trigonometry