4.5 Angle Relationships and Triangles

Front

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

Back

The sum of the interior angles of a triangle is 180 degrees.

Front

What do you call an angle that measures exactly 90 degrees?

Back

An angle that measures exactly 90 degrees is called a right angle.

Front

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

Back

The sum of the measures of two complementary angles is 90 degrees.

Front

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

Back

The sum of the measures of two supplementary angles is 180 degrees.

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle measures 90 degrees, and the sum of the other two angles is 90 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

If one angle measures 65 degrees, what is the measure of its complementary angle?

Back

The measure of its complementary angle is 25 degrees.

Front

If one angle measures 113 degrees, what is the measure of its supplementary angle?

Back

The measure of its supplementary angle is 67 degrees.