20-02-2015
Mathematics

contestada

Dereks dinner plate has a diameter of about 9 inches. Find its circumference and area.

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jjonathon7 jjonathon7

20-02-2015

circumference = pi x diameter
diameter = 9
circumference = 9pi or 9 x 3.14
area = pi x radius ^2
radius =1/2 diameter
radius=4.5
pi x 4.5 ^2
4.5 x 4.5 = 20.25
20.25 x 3.14
area = 64 circumference =28

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