math

If the number of square inches in the area of a circle is equal to the number of inches in its circumference,the diameter of the circle is

a. 4 inches
b. 2 inches
c. 1 inches
d. pi inches
e. 2 pi inches

please answer and explain

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asked by thomas
  1. A = C
    pi*r^2 = pi*D
    pi*r^2 = pi*2r
    Divide both sides by pi*r
    r = 2 Inches.
    D = 2r = 2 * 2 = 4 Inches.

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    posted by Henry

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