Asked by noelle
. A circle has a circumference of C inches and an area of A square inches. If C = 2/5 * A what is the diameter of the circle? A. 0.4 inches B. 0.8 inches C. 2.5 inches D. 10 inches
Answers
Answered by
Anonymous
r = C / 2pi
C=(2/5) * pi r^2
2 pi r = (2/5) pi r^2
r = 5
so D = 2 r = 10
C=(2/5) * pi r^2
2 pi r = (2/5) pi r^2
r = 5
so D = 2 r = 10
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