1. Drawn to Scale 2. The Triangle Sum Theorem 3. The Exterior Angle Sum Theorem 4. Using Algebra: The Exterior Angle Sum Theorem 5. The Pythagorean Theorem and a Proof 6. Distance and Midpoint Formulas 7. Inscribed vs. Circumscribed

1. Identifying Triangles: Angles 2. Identifying Triangles: Sides 3. What Kind of Triangle? 4. Triangle Inequality Theorem 5. Equilateral Triangle Construction 6. Base Angles Theorem 7. Triangle Sides and Angles 8. Missing Parts: Equilateral Triangles 9. Missing Parts: Isosceles Triangles

1. Five Ways to Show Triangles are Congruent 2. ASS? 3. Theorems and Proofs

1. Triangle Proof: AAS #1 2. Triangle Proof: ASA #1 3. Triangle Proof: SAS #1 4. Triangle Proof: SSS 5. Triangle Proof: ASA #2 6. Triangle Proof: AAS #2 7. Triangle Proof: HL 8. Triangle Proof: SAS #2

1. Congruent Triangles and CPCTC 2. Triangle Proof: CPCTC #1 3. Triangle Proof: CPCTC #2