please help :) I don't know how to figure out the surface area of a cylinder?
Author : Sarah
Submitted : 20180213 23:38:06 Popularity:
Tags: surface figure cylinder area
For the ends, it's just the area of two circles.
For the side, pretend you have cut it and spread it out, then it's like a rectangle. The height of the rectan
For the ends, it's just the area of two circles.
For the side, pretend you have cut it and spread it out, then it's like a rectangle. The height of the rectangle is the height of the cylinder, and the width is the circumference of the circular base.
Area of a cylinder having diameter , d , length l will have surface area Al = pi d l ( in case of an open cylinder at both ends along the length; but in case of closed end cylinder at both ends it would have additional surface area of A2 = 2 pid2/4 = pid2/2 .
Thus for closed cylinder total surface area = A1 + A2 = Pi d l + pid2//2 , where pi = 22/7  3.143
2 ends and a side
Area of a circle is pi r squared so you need two of them
And the area of the side is the circumference times the height, which is 2 pi r times h
For radius r and height h :
A = 2 π r ² + 2 π r h
A = 2 π r [ r + h ]
area of a cylinder is (2 pi r h) + (2 pi r2)


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