Triangle Sum and Exterior Angle Theorem

Front

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.

Back

180°

Front

If two angles of a triangle are 30° and 70°, what is the measure of the third angle?

Back

80°

Front

Angles that are exactly 90 degrees are called _____ ______.

Back

right angles

Front

What is the measure of angle a if the triangle has angles of 36°, 81°, and a?

Back

63°

Front

Which of the following terms best describes Angle d if it is outside the triangle and adjacent to one of the triangle's angles?

Back

Exterior angle

Front

In a triangle, if one angle measures 45°, what is the maximum possible measure of the other two angles?

Back

135°

Front

What is the relationship between interior angles and exterior angles in a triangle?

Back

The exterior angle is equal to the sum of the two remote interior angles.

Front

If a triangle has angles measuring 50° and 60°, what is the measure of the third angle?

Back

70°

Front

What do you call an angle that measures less than 90 degrees?

Back

acute angle

Front

What do you call an angle that measures more than 90 degrees but less than 180 degrees?

Back

obtuse angle