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Here are the three circle equations, in words and equations.

Circumfwerence - pi X diameter

C = pi d

Circumference = two X pi X radius

C = 2pi r

Area = pi X radius squared

A = pi r^(2)

NB It is only the radial value that is squared ; NOT 'pi'.

NB pi is a constant at 3.141592..., usually approximated to 3.14 or 3.1416.

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lenpollock

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the circumfrance

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13y ago
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