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Neat

https://commons.wikimedia.org/wiki/File:RightTriangleWithInsetCircle_xyz.svg

The radius of a circle inscribed in a 3-4-5 triangle is 1.

(In fact, the inradius of any Pythagorean triangle is an integer.)

July 9, 2019July 8, 2019 | Science & Math

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Futility Closet is a collection of entertaining curiosities in history, literature, language, art, philosophy, and mathematics, designed to help you waste time as enjoyably as possible.

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