Interior and Exterior Angles of Triangles

Front

What is an angle whose measure is exactly 90 degrees?

Back

Right angle

Front

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

Back

180 degrees

Front

Which set of angles can form a triangle: 45°, 65°, 70° or 150°, 110°, 100°?

Back

45°, 65°, 70°

Front

What type of angle measures less than 90 degrees?

Back

Acute angle

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle

Front

What is the term for angles that are opposite each other when two lines cross?

Back

Vertical angles

Front

If two angles are complementary, what is the sum of their measures?

Back

90 degrees

Front

If two angles are supplementary, what is the sum of their measures?

Back

180 degrees

Front

What is the measure of each angle in an equilateral triangle?

Back

60 degrees

Front

What is the relationship between the exterior angle and the two opposite interior angles of a triangle?

Back

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