What is the name of an interior angle of a triangle that shares a side and a vertex with an exterior angle of the triangle?
The measure of angle 4 is 120°, and the measure of angle 2 is 35°. What is the measure of angle 5?

Which statements are true for the image below? Check all that apply.









The measure of angle W is 100°, and the measure of angle Z is 68°. What is the measure of angle Y?

The measure of angle Y is 45°, and the measure of angle Z is 70°. What is the measure of angle W?

Which statements about the angles of the triangle are true? Check all that apply.

Several students made comments about this image. Which comment is true?

The sum of the measures of two angles of a scalene triangle is calculated, and the result is the same as the measure of one of the external angles of a triangle. Which pair of angle measures was calculated?
Which expression is equivalent to ?





What is the sum of the measures of the exterior angles of this triangle?

What is ?

What is the sum of the measures of the exterior angles of any triangle?
Cynthia is finding the measures of the labeled angles in this image. What is the least number of angle measures she needs to know to find the measures of all labeled angles in the image?

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