The Exterior Angle Theorem
Grade 7 · Math · 45 min
What's Included
Learning Objective
I can use the exterior angle theorem to solve for missing angle measures in triangles.
Warm-Up Video
Tutors · 2:43
Exterior Angle Theorem — Formula & Examples
Practice Questions
2 questions · Short answer
Exit Ticket
Quick comprehension check
“In triangle ABC, the measure of exterior angle A is 130°. If the measure of angle B is 65°, find the measure of angle C. Show your work. In triangle XYZ, the measure of exterior angle X is 115°. If the measure of angle Y is 50°, find the measure of angle Z. Show your work. In triangle PQR, the measure of exterior angle P is 120°. If the measure of angle Q is 72°, find the measure of angle R. Show your work.”
Complete Lesson Package
Get all 3 ready-to-use resources:
Teacher Guide
Student Doc
Slides
