SOLUTION: Express the area A of a circle as a function of (a) it's radius r and (b) it's diameter d.

Algebra ->  Functions -> SOLUTION: Express the area A of a circle as a function of (a) it's radius r and (b) it's diameter d.      Log On


   

Question 992491: Express the area A of a circle as a function of (a) it's radius r and (b) it's diameter d.
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
Area of circle(A) = pi * r^2 where r is radius and pi is approx 3.14
Diameter(D) of circle = 2 * r
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a) A = pi * r^2
b) A = pi * (D/2)