My dad recently asked me what would be larger: a circle in which you increase the circumference by 2, or a circle in which you increase the radius by two. Using a few formulas (C=2πr; A=πr^2), it became apparent that the circle in which you increase the radius by two is considerably larger. I was able to illustrate this in GSP so you could get a dramatic visual of the question. (TF-2)
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