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Learn about intersecting chords, secant segments, and tangent segments within circles. Understand the rules governing the products of segments and external points.
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Circles and lengths of segments Section 9-7
Intersecting chords When 2 chords intersect inside a circle, the product of the segments of one chord equals the product of the segments of the other chords.
2 Secant Segments When 2 secant segments are drawn to a circle from an external point, the product of one secant segment and its external segment equals the product of the other secant segment and its external segment.
Tangent and Secant segments When a secant and a tangent segment are drawn to a circle from an external point, the product of the secant segment and its external segment is equal to the square of the tangent segment