Lesson

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

Which of these angles is larger?

A

B

Worked Solution

Idea summary

Angles can be compared by how large the turn is between the lines.

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

Which angle is equal to 45 degrees?

A

B

C

Worked Solution

Idea summary

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

measures and constructs angles, and applies angle relationships to find unknown angles