Back to Use informal arguments to establish facts about angles and similarity of triangles — Problem 2 · Task Set 25

Use Informal Arguments to Establish Facts About Angles and Similarity of Triangles

Work through each section in order. Show your work where indicated, and state which angle relationship you used to find each answer.

Grade 8·23 problems·~40 min·Common Core Math - Grade 8·container·8-g-a-5
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Recall / Warm-Up

These problems review skills you already know.

1.

Two angles are supplementary. One of them measures 130°130\degree. What is the measure of the other angle, in degrees?