topic badge

9.04 Right angles

Lesson

Are you ready?

Do you remember what the measure of an angle represents? Let's try this problem to review. 

How many $1^\circ$1° angles fit into a full circle?

Learn

Let's learn about right angles and how we can compare other angles to them.

Apply

Question 1

A right angle is a:

  1. Quarter turn

    A

    Half turn

    B

Question 2

Which of the following is a right angle?

  1. A

    B

Remember!

A right angle is exactly $90^\circ$90°.

 

Outcomes

4.MD.C.5

Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint; and understand concepts of angle measurement.

What is Mathspace

About Mathspace