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°
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°