Formulas for Angles in Circles Formed by Radii, Chords, Tangents, Secants Formulas for Working with Angles in Circles (Intercepted arcs are arcs "cut off" or "lying between" the sides of the specified angles.)There are basically five circle formulas that you need to remember:1. Central Angle: A central angle is an angle formed by two intersecting radii such that its … [Read more...] about Formulas for Angles in Circles Formed by Radii, Chords, Tangents, Secants
Secants
Rules for Dealing with Chords, Secants, Tangents in Circles
Rules for Dealing with Chords, Secants, Tangents in Circles Theorem 1: If two chords intersect in a circle, the product of the lengths of the segments of one chord equal the product of the segments of the other. Intersecting Chords Rule: (segment piece)×(segment piece) = (segment piece)×(segment piece)Theorem Proof: Theorem 2: If two secant segments are drawn to a … [Read more...] about Rules for Dealing with Chords, Secants, Tangents in Circles