Using a protractor

By Casey Portelli

First take the protractor and place it like this:

Basically we are putting the shape on that circle that in it has a cross or a T. IT ALWAYS NEEDS TO BE ACCURATE OR ELSE THE ANSWER WILL BE WRONG.

Helpful tipsTo measure angles opening to the right use

the Top set of numbers.

120°

Helpful tipsTo measure angles opening to the left use the

Bottom set of numbers.

70°

Quiz time

Write and measure

Answers

1. 45°2. 130°3. 25°4. 160°-165°

Remember

Acute = 1°- 89° Right angle = 90° Obtuse = 91°-179° Angle on a straight line=180° reflex= 181°-359° One whole revolution=360°

The End