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15 December, 02:51

A paper model of the Khafre pyramid in Egypt has a square base 7.2 centimeters on each side. The slant height is 6 centimeters. How much paper was used to make the model?

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  1. 15 December, 03:04
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    To find how much paper for the model, you will use the formula for area of a square and area of a triangle.

    A = bh

    7.2 x 7.2

    A = 51.84 cm²

    A = 1/2bh

    1/2 x 7.2 x 6

    A = 21.6 cm²

    21.6 cm² x 4 = 86.4 cm²

    86.4 + 51.86=138.3

    You will need 138.3 cm² of paper.
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