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Mathematics 5 Online
OpenStudy (anonymous):

A square pyramid has a base area of 25 ft2. The pyramid’s total surface area is 105 ft2. What is the area of each triangular face?

geerky42 (geerky42):

Square pyramid is make of one square and four triangles. So to find area of triangle, you just subtract surface area by area of square, which will leaves us only four triangles. Divide it by 4 to get the area of each triangle. Does that make sense?

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