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Earn +20 ptsQ: What is 2pi r?
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Continue Learning about Geometry
Formula of r form c equals 2pi r?
The circumference of a circle C is 2Pixr So solving for r we have C/2Pi=r
How do you find the radius of a cylinder if the height is 32 feet and the circumference of the base is 135 feet?
C = 2(pi)(r) so that r = C/(2pi) = 135/(2pi) ≈ 21.5 ft.
What is the reciprocal of 2pi?
Reciprocal of 2pi = 1/(2pi) = 0.159155(rounded)
How do you find the perimeter of a cylinder?
Let h be the height of the cylinder and r the radius of the circular top/bottom. If you cut the cylinder down one side and roll it out, you have a rectangle. The length of the side is h and the width would be 2pi*r (the perimeter of a circle). Therefore, the perimeter of a cylinder is 2pi*r + 2h
How do you find the surface area of a cylinder that is r 3cm and h 10cm?
Area = 2pir2 + 2pirh Area = 2pi(3 cm)2 + 2pi(3 cm)(10 cm) = 245 cm2 -------------
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