Acute Angle

An acute angle is an angle with the measurement of less than 90 degrees.

Right Angle

A right angle is an angle with the measurement of exactly 90 degrees.

Obtuse Angle

An obtuse angle is an angle with the measurement of more than 90 degrees.

Straight Angle

A straight angle is an angle with a measurement of exactly 180 degrees.

Complementary Angle

A complementary angle is the sum of two angles’ measurements that must equal 90 degrees.

Supplementary Angle

A supplementary angle is the sum of two angles’ measurements that must equal 180 degrees.

Bisecting Angle

A bisecting angle is an angle that is split in half, therefore the measurements of both angles are the same.

Vertical Angle

A vertical angle is an intersection of two lines and the non- adjacent ends are vertical angles. Vertical angles also have to same measurement.

Linear Pair

A linear angle is when there are 2 lines and one of those lines stop at the other line so that they don’t intersect. The measurement must add up to 180 degrees.