Incircle Command

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Incircle[ <Point>, <Point>, <Point> ]
Returns Incircle of the triangle formed by the three Points.
Example: Let O=(0, 0), A=(3, 0) and B=(0, 5) be three points: Incircle[O, A, B] yields (x - 1.08)² + (y - 1.08)² = 1.18 in Menu view algebra.svg Algebra View and draws the corresponding circle in Menu view graphics.svg Graphics View.
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