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29 January, 15:48

Three sides of a quadrilateral measure 2.5 centimeters, 1.8 centimeters, and 9 centimeters. If the perimeter of the quadrilateral is 20.9 centimeters, what is the length of the fourth side?7.6 cm 15.7 cm 7 cm 34.2 cm

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  1. 29 January, 19:17
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    7.6 centimeters

    Step-by-step explanation:

    2.5 + 1.8 + 9 + x = 20.9

    13.3 + x = 20.9

    x = 20.9 - 13.3

    x = 7.6
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