Question

50 points ! Why Circumference of the circle = 2πr​

Answer 1

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☆☞ Here is ur answer ☜☆

✔✔ It is defined as the proportion of a circle's circumference to its diameter.

✔✔ First, we need to ask ourselves: Why is that no matter what diameter of a circle we have, the ratio of the circumference to the diameter are always the same?

✔✔ We have C = 2 π r , since π = C d = C 2 r by definition.

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Answer 2

ஜ۩۞۩ஜ ӇЄƳƛ MƛƬЄ ஜ۩۞۩ஜ

Answer...

This formula came from the fact that ,

pi (π) is defined as the ratio of the circumference (C) of the circle to its diameter (D) .

so,

$\pi \: = \frac{C}{D} \\ \\ since \: D \: = \: 2r \\ \\ \pi \: = \frac{C}{2r} \\ \\ hence \\ \\ C \: = \: 2\pi \: r$

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