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What's the circumference of acircle with a diameter of 9 inches?Use 3.14 for T.C = [?] inches

Whats The Circumference Of Acircle With A Diameter Of 9 InchesUse 314 For TC Inches class=

Sagot :

Given a cricle with radius "r", the diameter "d" is related by:

[tex]\begin{gathered} d=2r \\ r=\frac{d}{2} \end{gathered}[/tex]

For this circle, the circumference can be calculated by:

[tex]c=2\pi r[/tex]

We have d = 9 in and π = 3.14. So:

[tex]r=\frac{9}{2}=4.5[/tex][tex]c=2\pi r=2\cdot3.14\cdot4.5=28.26[/tex]

So, the circumference is 28.26 in.

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