1 of 8

3-4: Learning Goals

  • Let’s use π to solve problems.

Download for free at openupresources.org.

2 of 8

3-4-1: What Do We know? What Can We Estimate?

Download for free at openupresources.org.

3 of 8

3-4-2: Using π

Download for free at openupresources.org.

4 of 8

3-4-3: Around the Running Track

Download for free at openupresources.org.

5 of 8

3-4-4: Measuring a Picture Frame

Download for free at openupresources.org.

6 of 8

3-4: Lesson Synthesis

Download for free at openupresources.org.

C=2πr

7 of 8

3-4: Learning Targets

  • I can choose an approximation for π based on the situation or problem.
  • If I know the radius, diameter, or circumference of a circle, I can find the other two.

Download for free at openupresources.org.

8 of 8

3-4-5: Circumferences of Two Circles

Download for free at openupresources.org.

Circle A has a diameter of 9 cm. Circle B has a radius of 5 cm.

  • Which circle has the larger circumference?
  • About how many centimeters larger is it?