SOLUTION: What is the length of the diameter of a circle with an area of 9pi square units?

Question 894054: What is the length of the diameter of a circle with an area of 9pi square units?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!

A is for area
r is for radius
d is for diameter
, according to definition of diameter.

You are given A and you want to find d.

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

What is the length of the diameter of a circle with an area of 9pi square units?

Let diameter be D
Since area = , and radius = , then: becomes:

------ Cross-multiplying
------ Factoring out GCF,

D, or diameter = , or
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