Angle Bisectors on the Circumcircle

​
Extend the angle bisectors of the triangle ABC to meet the circumcircle at A', B' and C'. Then AA'
⊥
B'C', BB'
⊥
A'C', and CC'
⊥
A'B'.

External Links

Angle Bisector (Wolfram MathWorld)
Circumcircle (Wolfram MathWorld)

Permanent Citation

Jay Warendorff
​
​"Angle Bisectors on the Circumcircle"​
​http://demonstrations.wolfram.com/AngleBisectorsOnTheCircumcircle/​
​Wolfram Demonstrations Project​
​Published: March 7, 2011