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OpenStudy (anonymous):
the surface area of a pyramid is 189cm2 the area of the square base is 49cm2. what is the area of one triangular face of the lateral surface? show the steps and explain your work.
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OpenStudy (cwrw238):
total area = 49 + 4 * area of each triangular face 4 * area triangles = 189 - 49 area of triangle face = (189 - 49) / 4 cm2
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