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8 August, 21:14

The first side of a triangle is 9 meters shorter than the second side. The third side is 3 times as long as the first side. The perimeter is 39 meters. Find the length of the longest side.

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  1. 8 August, 22:40
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    The longest sides is 18 m long.

    Step-by-step explanation:

    Let x meters be the length of the first side.

    The length of the second side = x+9 m.

    The length of the third = 3x m.

    Perimeter = x + 3x + x + 9 = 39

    5x + 9 = 39

    5x = 30

    x = 6 m.

    The other 2 sides are 6+9 = 15 m and 3*6 = 18 m.
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