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Mathematics · L2 · Circles: Circumference & Area

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A quick guide to picking the right formula for a circle problem, starting from the radius or diameter you're given.

by @openstemUpdated Mathematics
⭕ Circle: radius rWhat do you need?📏 Circumference🟢 AreaC = 2πr = πdA = πr²Answer in plain units, e.g. cmAnswer in square units, e.g. cm²Distance around the edgeSpace inside

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