Understand Simple Angle Rules in Geometry

Learn the following angle facts:

An acute angle is between 0º and 90º

A right angle is exactly 90º

An obtuse angle is between 90º and 180º

A straight line angle is exactly 180º

A reflex angle is between 180º and 360º

There are 180º at angles that meet at a point on a straight line.

There are 360º at angles that meet at a point.

A ¼ turn is 90º

A ½ turn is 180º

A ¾ turn is 270º

A whole turn is 360º

Let's use this knowledge to help to answer the questions!