SOLUTION: A regular pyramid has a square base. One side of the base has a length of 12 units and the lateral surface area is 240 square units. Find the altitude of the pyramid.

Question 253467: A regular pyramid has a square base. One side of the base has a length of 12 units and the lateral surface area is 240 square units. Find the altitude of the pyramid.
Answer by Greenfinch(383) (Show Source): You can put this solution on YOUR website!
One face has an area of 60 sq units. So the height of that triangle is 10 units.
Distance from the centre to the edge is 6 units (half the edge length.
We now have a triangle with hypotenuse of 10 and one side of 6, by Pythagoras
(3,4,5, triangle) the height is 8 units

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