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

Work through problems with immediate feedback

Fluency Practice

Find each missing angle measure. State the relationship you used.

Two parallel lines are cut by a transversal. One interior angle measures $115\degree$ . What is the measure of the co-interior (same-side interior) angle?

$65\degree$

$115\degree$

$25\degree$

$90\degree$