Circles
100

What's the length of the diameter of the circle?

8.74 inches

200

What's the length of the radius of this circle?

4.37 inches

300

Approximate the circumference of a circle with diameter 15 inches. Use 3.14 for 

pi

47.1 inches

400

Approximate the circumference for a circle with radius 7 meters. Use 22/7 for pi.

44 meters

500

Find the approximate diameter of a circle with circumference 28.27 yards

9 yards