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| Math Central | Quandaries & Queries |
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Question from Tracey: Hello, I appreciate any help...I basically need the width from left to right to see if I can fit |
Hi Tracey,
The relationship between the circumference $C$ and the diameter $D$ of a circle is
\[C = \pi \; D\]
where $\pi$ is approximately 3.1516. Thus if you know the diameter of a circle you can find the circumference by multiplying the diameter by $ \pi.$
If you divide both sides of the equation above by $\pi$ it becomes
\[D = \frac{C}{\pi}\]
and hence if you know the circumference of a circle you can find its diameter by dividing the circumference by $\pi.$
I hope this helps,
Penny
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