Angles and Triangles

Front

What is the sum of the interior angles in a triangle?

Back

180 degrees.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal.

Front

If one angle measures 50 degrees, what is the measure of its complementary angle?

Back

40 degrees.

Front

If two angles are supplementary and one measures 130 degrees, what is the measure of the other angle?

Back

50 degrees.

Front

In a right triangle, what is the measure of the right angle?

Back

90 degrees.

Front

What is the measure of angle x if it is complementary to 70 degrees?

Back

20 degrees.

Front

How do you find the measure of an unknown angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.