M13 - Angles & Triangles

Front

Two angles in a triangle measure 20 and 120. Find the other angle.

Back

40

Front

An angle that measures exactly 90 degrees is called what?

Back

right

Front

Two angles in a triangle measure 35 and 55. Find the other angle.

Back

90

Front

What do you call two angles that have a sum of 180 degrees?

Back

supplementary

Front

The Triangle Sum Theorem states that the interior angles of a triangle add up to ___ degrees.

Back

180

Front

What is the sum of the interior angles of any triangle?

Back

180 degrees

Front

If one angle in a triangle is 60 degrees and another is 70 degrees, what is the third angle?

Back

50 degrees

Front

What do you call two angles that add up to 90 degrees?

Back

complementary

Front

In a right triangle, what is the relationship between the angles?

Back

One angle is 90 degrees, and the other two angles are acute.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.