Similar Triangles Determined by Miquel Circles and the Circumcircle

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Let ABC be a triangle and let , , and be points on BC, CA, and AB, respectively. Suppose that the circumcircles of , , and (the Miquel circles) intersect the circumcircle of ABC at points , , and , respectively, where , , and . Let , , and be symmetric to , , and with respect to the midpoints of BC, CA, and AB, respectively. Then and are similar.

Contributed by: Jay Warendorff (March 2011)
Open content licensed under CC BY-NC-SA


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