Incircle Command
From GeoGebra Manual
- 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
Algebra View and draws the corresponding circle in 
Graphics View.
