Euclid's Muse

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Maximum Angle of Reflection

Profile picture of Phil Todd

Phil Todd



Drag B to find the maximum angle of reflection.

The circumcircle of ABC is the locus of all points which subtend the same angle on chord AC.

In general G is inside the circumcircle and so angle AGC < angle ABC.

The exception is when B=G.

Tags: caustic, reflection
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