math

If the area of a circle is twice the area of a triangle whose base is 4 pi and whose altitude is 4, the radius of the circle equals

a. square root 32
b. 2
c. 4
d. 8
e. 32

please answer and explain

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asked by thomas
  1. C) 4

    The area of the circle is twice the area of the triangle. Fina the area of the triangle and multiply it by two.

    1/2(3.14*4)(4)= 25.12

    25.12*2= 50.24

    50.24 is the area of the circle so..

    50.24= pi(radius^2)

    50.24/3.14= 16

    The square root of 16= 4

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