To the core

A non-isosceles triangle with a red cevian and three line segments to a point on the cevian. Prove that this point is the incentre of the triangle.

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Solution by ricardpe.


To the core
The golden Harp
Rolls up it’s spiral
About music notes
His lyre strings
Are moored
And vibrate in the wind
A harmony to the core
A sweet mix
Played by angel fingers
A charming sound deep from the heart
The notes rise to the sky
It’s the golden Harp


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