Triangle Exterior Angles and Equations
Grade 7 · Math · 45 min· 8.g.5 Use Informal Arguments To Establish Facts About The Angle Sum And Exterior Angle Of Triangles, About The Angles Created When Parallel Lines Are Cut By A Transversal, And The Angle-angle Criterion For Similarity Of Triangles.
What's Included
Learning Objective
I can write and solve equations to find missing angle measures in triangles using the exterior angle theorem.
Warm-Up Video
Unknown Channel · 5:00
Angles of Triangle: Sum of Interior Angles and Exterior Angle Theorem by @MathTeacherGon
Practice Questions
7 questions · Short answer
Exit Ticket
Quick comprehension check
“In a triangle, two interior angles measure 40° and 65°. Find the measure of the exterior angle formed at the vertex of the third interior angle. An exterior angle of a triangle measures 130°. One of the non-adjacent interior angles measures 50°. Find the measure of the other non-adjacent interior angle. ”
Complete Lesson Package
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