What does chords mean in geometry

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Intersecting Secants Theorem. In the figure at the top of the page, click "Show Right Bisector". Then move one of the points P,Q around and see that this is always so. This can be used to find the center of a circle: draw one chord and its right bisector. The center must be somewhere along this line. Repeat this and the two bisectors will meet at the center of the circle. See Finding the Center of a Circle in the Constructions chapter for step-by-step instructions.

If two chords of a circle intersect, the intersection creates four line segments that have an interesting relationship.