1.Look at Model It. How do you know that angle CDE and angle EDF are supplementary? A. They form a straight line.
B . They form a right angle.
2.How do you know that the measures of angle CDE and angle EDF add to 180 degrees?
A. The measures of complementary angles add up to 90 degrees.
B. The measures of supplementary angles add up to 180 degrees.

3.Since you know that X=62, what is the measure of angle CDE?
A. 125 degrees
B. 55 degrees

4.Since you know that X=62, what is the measure of angle EDF?
A. 125 degrees
B. 55 degrees
5.What is the measure of angle ADC?

A. 125 degrees
B. 55 degrees

6.How can you explain your reasoning for your answer to question #5?
A. A right angle measures 90 degrees.
B. Angles ADC and EDF are vertical angles, so they have the same measure.

7.What facts about angles can you use to find the unknown angle measures?

A. Right angles measure 90 degrees.
B. Vertical angles are equal.
C. Supplementary angles add up to 180 degrees.