# ResMath Measuring Angles Using Protractor

## PART 1: Practice using a protractor!

1. Click and drag on the protractor to move it.
2. Click and drag on the red dot to turn it.
3. Line the protractor on the angle. Do you see the angle's measure?
5. Click and drag the green dots on the angle to change its size.

## PART 2: Make a right angle!

A right angle is 90. The corner of a book or a piece of paper or the places where the lines cross on a plus sign are examples (+) Use the green dots to make this angle 90. Check your work using the protractor.

## PART 3: Make an acute angle!

An acute angle is 1-89. A slice of pie or an inequality symbol are examples of acute angles (><). Use the green dots to make an acute angle below. Check your work using the protractor.

## PART 4: Make an obtuse angle!

An obtuse angle is 91-179. The roof of a house or the edges of a stop sign are examples of obtuse angles. Use the green dots to make an obtuse angle below. Check your work using the protractor.