ResMath Measuring Angles Using Protractor
PART 1: Practice using a protractor!
- Click and drag on the protractor to move it.
- Click and drag on the red dot to turn it.
- Line the protractor on the angle. Do you see the angle's measure?
- Check the Answer box to show your angle's measure.
- 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.