Estimating Angle Size

You will be working with five types of angle.

An acute angle is less than 90º

A right angle is 90º

An obtuse angle is between 91º and 179º

A straight angle is 180º

A reflex angle is between 181º and 360º

Remember - You can fit a square exactly into a right angle.

You are given a choice of three answers. Use the information above to help you when you estimate the size of the angle.