Prerequisites: Reviewing Geometry

Angle Review

Acute: An angle with the measure greater than zero but less than ninety degrees.

Acute angle
Right: An angle with a measure of exactly ninety degrees.
Right angle
Obtuse: An angle with a measure greater than ninety but less than one-hundred eighty degrees.
Obtuse angle

Straight: An angle with a measure of exactly one-hundred eighty degrees.

Straight angle