Hannah D..  Radius is half the way across the circle  Diameter is the whole way across the circle.

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Presentation transcript:

Hannah D.

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

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

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

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

Find the circumference of the circle below 4 cm.

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

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

A= pi x radius squared A = pi x 6 x 6 A = 3.14 x 36 A= ft squared

 Find the area of this circle 3 3 yd.

A = pi x radius squared A = pi x 3 x 3 A = 3.14 x 9 A = yards squared

mages/radius.gif mages/diameter_only.gif NFQR1HEAY/Radius-and-Diameter.jpg