Circumference 69934

You know the ratio of the circumference of the circle to the area is 4:9. What is the circle's diameter?

Correct answer:

d =  9

Step-by-step explanation:

o:S=4:9 2 π r : π r2 = 4:9 2  : r = 4:9  r=2 49=42 9=418=29=421=4.5  d=2 r=2 4.5=9



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