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11 December, 14:29

Serena is making a model of one of the Egyptian pyramids. The square base has sides that are all 4.2 in. Each of the triangular faces has a base of 4.2 in and a height of 3.6 in. How much paper would it take to cover the entire pyramid?

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  1. 11 December, 14:55
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    47.88 in^2 of paper.

    Step-by-step explanation:

    The amount of paper needed for the base = 4.2^2 = 17.64 in^2.

    There are 4 triangular faces.

    The area of each triangular face = 1/2 * base * height

    = 1/2 * 4.2 * 3.6

    = 7.56 in^2

    That is a total of 4 * 7.56 = 30.24 in^2.

    So the total amount of paper need to cover the entire pyramid

    = 17,64 + 30.24

    = 47.88 in^2.
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