Two moving tangent circles can trace ellipses

## Haruki’s Theorem

Given 3 circles, each intersecting the other two in two points, the line segments connecting their points of intersection satisfy: ace/bdf = 1

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# Tag: circles

## Ellipse-Tracer

## Haruki’s Theorem

Given 3 circles, each intersecting the other two in two points, the line segments connecting their points of intersection satisfy: ace/bdf = 1

Two moving tangent circles can trace ellipses