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5 votes
A circular plate has a diameter of 9 inches.What is the area of the plate?

2 Answers

4 votes

63.585 inches^2

Explanation:

The formula for the area of a circle is...


A=\pi r^2

We need the radius for this, but we have the diameter. Since radius is half of the diameter, we know the radius will be 4.5. We can plug that in.


A=3.14*4.5*4.5


A=

63.585 inches^2

User Ikathegreat
by
4.2k points
5 votes

Answer: 63.61725124

Explanation:

area = pi x r^2

diameter is double the radius, labeled r in the formula.

9/2 = 4.5

r = 4.5

area = pi x 4.5^2

area = 63.61725124 or 81/4pi

User AliSh
by
4.1k points