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10 December, 13:43

An equilateral triangle has a perimeter of 12x+18 units. Which expression can be used to show the length of one side of the triangle?

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  1. 10 December, 15:31
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    Perimeter is the sum of all of the sides. Triangles have three, so the expression to use is 12x + 18/3, or 4x + 6.
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