What is the volume of the cylinder with a diameter of 16ft and height of 10ft?

 r = 16/2 = 8

using 3.14 for π since you don't say what to use

2x3.14x8x10 = 502.4

2x3.14x8^2 = 401.92

401.92 + 502.4 = 904.32 cubic ft.

 Round answer as needed

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geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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