Review Lesson 3-4: ∠ABC and ∠CBD form a linear pair. If m∠ABC = 3x + 20 and m∠CBD = x + 32, find the value of x. Enter only a number.
Review Lesson 3-4: ∠1 and ∠2 are supplementary. If ∠1 ≅ ∠2, find m∠1 and m∠2. Enter only a number.

Review Lesson 3-4: If ∠1 and ∠2 are supplementary, what can you conclude about lines a and c?
Vocabulary Review: Identify the part of speech for the word alternate in each sentence on the right.
NOUN
VERB
ADJECTIVE
You vote for one winner an one alternate.
Your two friends alternate serves during tennis.
You and your sister babysit on alternate nights.
Use Your Vocabulary: Classify each statement as true or false.
A triangle is a polygon with three or more sides.
In order to triple an amount, multiply it by three.
A triathlon is a race with two events - swimming & bicycling.
A tripod is a stand that has three legs.
True
False