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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

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8mo ago

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More answers

Circumference of a circle = pi*diameter or 2*pi*radius

Circumference = pi*2.5 = 7.853981634 square units

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Wiki User

15y ago
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Q: Circle diameter of 2.5 what is the circumference?
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