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That humble equation describing a right triangle led to the invention of coordinate geometry, an essential tool for mapping and measuring the planet.—Valerie Ross, Discover Magazine, 8 Apr. 2012 No fair using coordinate geometry — every point must be delineated by one single arithmetically manipulable number only.—Quanta Magazine, 14 Feb. 2019 The first of these problems can be solved by classical or coordinate geometry, but the complex number solution is simpler (go figure!).—Quanta Magazine, 14 Feb. 2019
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