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If by ' A 64 pi' you mean the Area. Then

A = 64pi

Since A = pi r^2 and 64 is 8^2

Then we can say r(radius)= 8

The circumference of a circle is

C = 2pir

Hence

C = 2 x 3.14 x 8

C = 16 x 3.14

C = 50.24 linear units.

The value for 'pi' at 3.14 is an approximation.

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lenpollock

Lvl 16
1y ago

What else can I help you with?