Mathematics, 08.10.2019 17:50 aaburto1515

Apyramid 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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Apyramid has all sides that are equilateral triangles. each triangle has side lengths of 9 centimete...