Incircle and excircles of a triangle

Topic:Geometry, Incircle or Inscribed Circle

Triangle ABC and extended sides shown in red Internal angle bisectors shown in green External angle bisectors shown in blue Some construction lines and points are hidden

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bewijs stelling van Pythagoras
Sticky point to list of points
Vector Valued Functions
apec
Tube moving at distance of a curve.

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linear equation
Quad E
ภาคตัดกรวย
Function
Double Number Line Maker

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Numbers
Indefinite Integral
Trapezoid
Arithmetic Mean
Reflection