Name: Period: ______ Geometry Date: Chapter 10

Name: ______________________________________________ Geometry Chapter 10 Study Guide Definitions: Radius Diameter Chord Secant Tangent Arc Central angle Minor arc Major arc Semicircle Inscribed angle Tangent-chord angle Chord-chord angle Secant-secant angle Secant-tangent angle Tangent-tangent angle

Period: _____________ Date: ______________

Theorems: • If a radius is perpendicular to a chord, ⇔ _________________________________________________________. •

If two chords of a circle are equidistant from the center, ⇔ ___________________________________________.

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If two central angles of a circle (or of congruent circles) are congruent, ⇔ _______________________________.

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If two central angles of a circle (or of congruent circles) are congruent, ⇔ _______________________________.

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If two arcs of a circle (or of congruent circles) are congruent, ⇔ _______________________________________.

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Two-Tangent Theorem: ________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________

Postulates: • A tangent line is ____________________________________ to the radius drawn to the point of contact. Formulas: Area of a circle Circumference Measure of central angle Measure of inscribed angle Measure of chord-chord angle Measure of tangent-chord angle Measure of secant-secant angle Measure of tangent-tangent angle Measure of secant-tangent angle Measure of an arc Arc length