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Remember and comit to memory the two circle equations.

C = pi d = 2 pi r

&

A = pi r^(2)

Taking the first equation

C = pi d

d = 2.5

pi = 3.141592..... ~ 3.14

Hence

C = 3.14 * 2.5

C = 7.85 units.

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lenpollock

Lvl 16
8mo ago

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