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Earn +20 ptsQ: What is surface area of disc?
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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.
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
What is the formula for the area of a disc?
The area of a disc of radius R units is pi*r^2 square units.
What is the surfqace area of a cylinder?
It is the surface area of the two ends plus the surface area of the curved surface. Surface area of each end is pir2 Surface area of the curved surface is 2pirh Total surface area = 2pir2 + 2pirh
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.
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