Sprint 8 · Chapter 1

Angles Of Isosceles And Equilateral Triangles

Use congruence to prove that angles opposite equal sides are equal, and that each angle of an equilateral triangle is 60°.

1. 1Congruence as a Tool
2. 2The Altitude Splits It
3. 3Angles Opposite Equal Sides
4. 4Every Angle Is 60 Degrees
5. 5Complete the Derivation
6. 6Find the Missing Angles
7. 7Congruent Triangles Around Us
8. 8Describe What You See
9. 9Base Angles Step by Step
10. 10Isosceles and Equilateral Recall