9.05 Estimate angles

Lesson

Practice

Lesson

Are you ready?

Being able to compare angles can help us in this lesson. Let's try this problem to review.

Which of these angles is $larger$ ?

Learn

Let's see how we can use angles we know to estimate other angles.

Apply

Question 1

Which angle is $equal to$ $45$45 degrees?

A
B
C

Question 2

Estimate the size of the angle made by the mountains at the center.

Less than $45^\circ$45°
A
Equal to $180^\circ$180°
B
Greater than $90^\circ$90°
C

Remember!

If we remember some important angles, we can use those to estimate other angles.

Outcomes

MA.4.GR.1.2

Estimate angle measures. Using a protractor, measure angles in whole-number degrees and draw angles of specified measure in whole-number degrees. Demonstrate that angle measure is additive.