First, we take the 3/4 and multiply 72 by it's reciprocal, 4/3. Your answer would come to c= 96.
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A hexagon has 6 even corners that are connected evenly as shown.
A scale factor is a number which scales, or multiplies, some quantity. In the equation y = Cx, C is the scale factor for x. C is also the coefficient of x, and may be called the constant of proportionality of y to x.