12.5 Warm-Up

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What is the definition of complementary angles?

Back

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

Front

What is the definition of supplementary angles?

Back

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

Front

What type of angle is less than 90 degrees?

Back

An acute angle.

Front

What type of angle is exactly 90 degrees?

Back

A right angle.

Front

What type of angle is greater than 90 degrees but less than 180 degrees?

Back

An obtuse angle.

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Front

If two angles are adjacent, what does that mean?

Back

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

Front

What is the equation to find the measure of a complementary angle if one angle is 24 degrees?

Back

The equation is 90 - 24 = x, where x is the measure of the complementary angle.

Front

If two angles are supplementary and one angle measures 70 degrees, what is the measure of the other angle?

Back

The measure of the other angle is 180 - 70 = 110 degrees.