Angle Relationships

Front

What are angles whose measures sum up to 180 degrees?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What are angles whose measures sum up to 90 degrees?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is the measure of an obtuse angle?

Back

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

Front

What is the measure of a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is the measure of an acute angle?

Back

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

Front

If two angles are complementary and one angle measures 25 degrees, what is the measure of the other angle?

Back

The other angle measures 65 degrees (90 - 25 = 65).

Front

If two angles are supplementary and one angle measures 25 degrees, what is the measure of the other angle?

Back

The other angle measures 155 degrees (180 - 25 = 155).

Front

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

Back

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

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal; they are the angles opposite each other when two lines intersect.

Front

What is the relationship between adjacent angles?

Back

Adjacent angles share a common side and a common vertex but do not overlap.