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**Trisection of Apollonius**

This is not a compass and ruler construction. Move the
green point, until the ray goes through the blue point. Proof that the brown
angle than trisects the blue one. The two green lines are equal.

### Technical Information

One could present this construction, such that both ends of
the green line can be moved. However, we made it easier for the user by keeping
one endpoint, where it belongs.