Question

A pizza recipe calls for the dough to be

rolled out to form a circle with a diameter of
18 inches. Find the area of the dough when it
is rolled out. Use 3.14 for pi. Give the answer
to the nearest hundredth.


Area = ___

Answer 1

254.34

Explanation:

Area of a circle: A = (pi)r^2

18 is the diameter

To find the radius you must divide 18 by 2 to get 9

Then 9 is squared "by the formula" and you get 81

81 is multiplied by 3.14 due to the area of a circle and you get ...

254.34 = AREA

Answer 2

Answer: 254.34 square inches

You may need to erase the "square inches" portion, and type the number only.

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Work Shown:

d = 18 = diameter

r = d/2 = 18/2 = 9 = radius

A = area of the circle

A = pi*r^2

A = 3.14*9^2

A = 3.14*81

A = 254.34 square inches

This area is approximate since pi = 3.14 is approximate.