Unit 4: Triangle Congruence

Lessons

• Lesson 4.1: SSS & SAS Proof Exercises
  Practice proving triangle congruence using the Side-Side-Side and Side-Angle-Side theorems in structured geometric proofs.
• Lesson 4.2: ASA & AAS Proof Exercises
  Use Angle-Side-Angle and Angle-Angle-Side relationships to justify triangle congruence and complete formal diagram proofs.
• Lesson 4.3: HL & CPCTC Diagram Exercises
  Apply the Hypotenuse-Leg theorem for right triangles and use CPCTC to prove corresponding parts of congruent triangles.
• Lesson 4.4: Triangle Inequalities Problem Set
  Solve problems involving the triangle inequality theorem, side length constraints, and geometric reasoning about possible triangles.