1. Hannah D.

2.  Radius is half the way across the circle  Diameter is the whole way across the circle

3.  If you take the radius times 2 you get the diameter

4.  Find the circumference of a circle with a diameter of 3 inches.

5. C=pi x diameter C=3.14 x 3 C= 9.42 inches

6. Find the circumference of the circle below 4 cm.

7. C= pi x diameter C= 3.14 x 8 C=25.12 cm.

8.  Find the area of a circle that has a radius of 6 ft.

9. A= pi x radius squared A = pi x 6 x 6 A = 3.14 x 36 A= 113.04 ft squared

10.  Find the area of this circle 3 3 yd.

11. A = pi x radius squared A = pi x 3 x 3 A = 3.14 x 9 A = 28.26 yards squared

12. http://www.golfingmachinist.com.au/upload/i mages/radius.gif http://www.golfingmachinist.com.au/upload/i mages/diameter_only.gif http://www.instructables.com/image/F0ECED NFQR1HEAY/Radius-and-Diameter.jpg