Bunuel wrote:

A 3 by 4 rectangle is inscribed in a circle. What is the area of the circle?

(A) 6.25π

(B) 9π

(C) 12.25π

(D) 16π

(E) 25π

The diagonal of the rectangle is 5 since we have pythagoras right triangle 3-4-5 .

This diagonal is the diameter of the circle .

Area = pi* (5/2)^2 = 6.25 pi

Answer A

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