Interior and Exterior Angles of Triangles

Front

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

Back

360°

Front

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

Back

180°

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

Right triangle

Front

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

Back

60°

Front

If two angles of a triangle are 45° each, what is the measure of the third angle?

Back

90°

Front

What do you call an angle that is greater than 90° but less than 180°?

Back

Obtuse angle

Front

What do you call an angle that is less than 90°?

Back

Acute angle

Front

In a triangle, if one angle measures 30°, what is the maximum possible measure of the largest angle?

Back

150°

Front

If angle a + angle b = 90°, what relationship do angle a and angle b have?

Back

They are complementary angles.

Front

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

Back

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