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23 August, 15:55

A company makes traffic signs. One of their signs can be modeled by an equilateral triangle with a perimeter of 144 inches. The company makes a similar sign with perimeter that is 1.25 times the one shown. What is the height in inches of the larger sign?

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  1. 23 August, 16:13
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    The perimeter of the larger sign : 144*1,25 = 180 inches

    Side of the triangle = 180/3 = 60 inches

    square of the height = 60^ (2) - 30^ (2) = 2700 (Pythagoras' theorem)

    height = square root (2700) = 51,96
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