find the surface area of the space figure. 28 ft by 36 ft.
its a cylinder if that helps
plz help!
Surface Area = Areas of top and bottom +Area of the side Surface Area = 2(Area of top) + (perimeter of top)* height Surface Area = 2(pi r 2) + (2 pi r)* h
a cylinder is made up of 3 parts: 2 circles are each end, and a rectangle wrapped around the circles for the main part
it is a 3dimenton figer
Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h
ok, but why is that the case? because there are 2 circles (for the 2 * pi*r^2), then a rectangle which constitutes the middle, the rectangle has height=h, and the width of the rectangle equals the circumference of the circle, which is 2*pi*r
so the area of the two circles is: 2* (pi*r^2) area of the rectangle is: h * width, where width = 2*pi*r, so -> h*(2*pi*r)
(h is the height of the cylinder, r is the radius of the top)
so as glenn pointed out: Surface Area of a Cylinder = 2 pi r 2 + 2 pi r h
which is area of both circles plus the area of the rectangle
yes
hold on wrong chat
that i am get ing i have not did this in a long time
Surface Area = 2(pi r 2) + (2 pi r)* h
yes..
ok?
sorry was gone
dk?
help?
yes with what
???
same question
Surface Area = 2(pi r 2) + (2 pi r)* h
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