A pyramid has all sides that are equilateral triangles. Each triangle has side lengths of 9 centimeters. If the surface area of the pyramid is 140.4 square centimeters, what is the slant height of the pyramid?
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Home » Mathematics » A pyramid has all sides that are equilateral triangles. Each triangle has side lengths of 9 centimeters. If the surface area of the pyramid is 140.4 square centimeters, what is the slant height of the pyramid?