Uploaded June 2017 | Updated September 2026, 1 week ago
demonstrations.wolfram.com/FiveConcyclicPointsInATriangle
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
Let ABC be a triangle with incenter I. Let A_1, B_1, C_1 be the projections of I on the sides of ABC. Let F be the intersection of the lines AI and A_1C_1. Then A_1, C, B_1, I and F lie on the dashed black circle of diameter CI, and the lines AI and CF ...
Contributed by: Jean Michel Tardieux
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/FiveConcyclicPointsInATriangle
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
Let ABC be a triangle with incenter I. Let A_1, B_1, C_1 be the projections of I on the sides of ABC. Let F be the intersection of the lines AI and A_1C_1. Then A_1, C, B_1, I and F lie on the dashed black circle of diameter CI, and the lines AI and CF ...
Contributed by: Jean Michel Tardieux
Audio created with WolframTones:
tones.wolfram.com
![First[{}]](https://i.ytimg.com/vi/Q92cVJQ5UAc/mqdefault.jpg "First[{}]
http://demonstrations.wolfram.com/ThePlemeljConstructionOfATriangle10
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
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Audio created with WolframTones:
http://tones.wolfram.com")
