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24 February, 23:43

A regular rectangular pyramid has a base and lateral faces that are congruent equilateral triangles. it has a lateral surface area of 72 square centimeters. what is the surface area of the regular triangular pyramid?

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  1. 25 February, 01:50
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    if i understand the question correctly:

    square pyramid has 4 sides

    72/4 = 18

    area of each side

    so a triangular pyramid has 3 sides

    18 * 3 = 54 square cm
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