SOLUTION: A pyramid has a square base with an area of 100 square inches. Each of its triangular faces has a height of 10 inches. What is the surface area of the pyramid?

Question 550018: A pyramid has a square base with an area of 100 square inches. Each of its triangular faces has a height of 10 inches. What is the surface area of the pyramid?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Since the area of the base is 100 sq in. this means that the side length of the base is inches. So the area of each triangular face is square inches.

So

Surface Area of Pyramid = Area of base + 4*Area of Triangular Face

Surface Area of Pyramid = 100 + 4*50

Surface Area of Pyramid = 100 + 200

Surface Area of Pyramid = 300 square inches
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