A standard CD is 4.75
5 inches rounded in diameter.
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pi*2r=cpi*d=cd=c/pidiameter=8.91267681
A regular CD has a diameter of about 4.75 inches, which means it has a radius of about 2.375 inches. The area of a circle is calculated using the formula A = πr^2, so the area of a regular CD is approximately 17.67 square inches. So, there you have it, the sassy answer to your CD area question.
The diameter of a CD is 11.43 so the radius is 5.715.
is it a pencil.
many. I have many cd's. I have a lot of cd's