Evaluate
WOLFRAM|DEMONSTRATIONS PROJECT

Nine-Point Circle in the Complex Plane

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θ
1
1.5708
θ
2
3.66519
θ
3
5.75959
A
B
C
O

Drag the sliders to explore triangles with vertices on the unit circle and their nine-point circles. Use the bookmark for right triangles, moving the
θ
3
slider.