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Earn +20 ptsQ: What is the formula for the area of a disc?
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The distance from the center of a compact disc to the edge of the disc is 6 centimeters. What is the area of the compact disc?
Area of disc: pi*6^2 = 36*pi square cm
How do you find the area of a ring?
If R and r are the outer and inner radii of the annulus (ring) then the area is pi*(R2 - r2), which is simply the area of the big disc minus that of the little disc.
What is surface area of disc?
Surface area in square units = pi*radius2
What is the surface area of disc for both side of disc surface?
Pi*6 * * * * * Independent of the radius? Makes no difference if the disc is twice as wide? I think not! It is actually 2*pi*r2 where r is the radius of the disc.
Is the formula for finding the area of an oval the same as the formula for finding the area of a circle?
No because the formula for finding the area of an oval, which is an ellipse, is quite different
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