Two secants, intersecting in an exterior point of a circle, have that the product of the segment from the closest intersected point in the circle to the exterior point, and the full length of the secant from the exterior point to the furthest intersected point in the circle is equal to the same product in the other secant.
Drag points "A" or "B" to verify how these two products are equal. Observe the equations on the sides of the circle.
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