Angles Introduction

Estimate the angle size.

• 60

• 90

• 180

Supplementary Angles add up to

• 180*

• 100*

• 90*

• 360*

Complementary Angles add up to

• 180

• 90

• 100

• 360

• right angle

• straight angle

• acute angle

• obtuse angle

What is a good estimate of this angle?

• 360

• 180

• 20

• 110

What is the name of the part of the angle where the two points meet?

• angle

• point

• vertex

What symbol is used for measuring the size of an angle?

• ∠

• °

• ─

• △

Which angle measures exactly 90°?

• Right angle

• Acute angle

• Obtuse angle

• Straight angle

∠BOA = ______

• 120°

• 65°

• 60°

• 55°

Which angles are vertical angles?