- Arcs & angles formed by intersecting chords, secants, and tangents have special relationships in a circle
- The angle measure is equal to half the sum of the intercepted arcs when two secants or chords intersect inside the circle
- If a secant and a tangent intersect at the point of tangency, the angle measure is equal to half the measure of its intercepted arc
- When a secant and a tangent intersect in the exterior of a circle, the angle measure is equal to half the measure of the intercepted arc
- Understanding these relationships and formulas is crucial for solving geometry problems and understanding circle properties
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