Interior/Exterior Angles - Triangles

Front

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

Back

180°

Front

An angle that is exactly 90 degrees is called ______.

Back

right

Front

Which of the following sets DO NOT make a triangle? 60, 60, 60; 55, 65, 45; 45, 90, 45; 75, 40, 65.

Back

55, 65, 45

Front

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

Back

360°

Front

An angle that is less than 90° is called ______.

Back

acute

Front

An angle that is greater than 90° but less than 180° is called ______.

Back

obtuse

Front

The sum of the interior angles of a triangle with angles measuring 50° and 60° is ______.

Back

70° (because 180° - (50° + 60°) = 70°)

Front

If one angle of a triangle is 30° and another is 60°, what is the measure of the third angle?

Back

90° (because 180° - (30° + 60°) = 90°)

Front

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

Back

135° (because 180° - 45° = 135°)

Front

The exterior angle of a triangle is equal to the sum of the two opposite interior angles. True or False?

Back

True