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Earn +20 ptsQ: How do you find R2?
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How do you find the area an circle?
Pi R2
How do you find the area of circle with the radius?
Area = pi R2
How do you find a diameter?
To find the diameter of a circle you multiply the radius by 2 or d=r2
How do you find the diameter of a sphere when you have the surface area?
Using the formula for the surface area of a sphere, which is SA = 4 (pi) r2, you can find the radius, and the diameter of the sphere is twice the radius. Example: If the surface of a sphere is 380 square cm 4 (pi) r2 = SA 4 (3.1416) r2 = 380 12.5664 r2 = 380 r2 = approx. 30.24 r = 5.5 and diameter D = 11 cm
How do you find the surface area of a sphere?
S=4*pi*r2
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