Asked by Sally


Surface area of a square pyramid
11in 13in and 9in

11 height
13 side?
9 base edge

I keep getting the wrong answer its not 328.62 or 294.93

Square area of a cone

15 side?
12 height
6 base

It's not 365.99 or 417.62


I don't need anything rounded...help please!
Answered by Steve
If 13 is the slant height of a triangular face, then the area of the pyramid is just the base plus four triangles:

11*11 + 4*(11*13/2) = 407

I keep having trouble guessing what you mean by "side" especially of a cone.
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