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Geometry B Date: ____________ 12.2 – Arcs and Chords Objective: To apply properties of arcs and chords Definitions: Central Angle - __________________________________________________________ Arc - ___________________________________________________________________ ________________________________________________________________________ Naming Arcs Minor arcs may be named by only _______ points. Major arcs must be named by _________ points. Ex. 1: Data Application a. The circle graph shows the types of grass planted in the yards of one neighborhood. Find mKLF. b. Use the graph to find each of the following FME ___________ FMC ___________ HG _____________ AC ______________ CHA ____________ Adjacent Arcs - _______________________________________________________ Ex. 2: Using the Arc Addition Postulate a. Find mBD b. Find mJKL and mLJN Properties of Chords 1. If two chords are congruent, their central angles and arcs are ___________________ (and the reverse is true also). 2. If two central angles are congruent, their chords are ______________________ Ex. 2: Applying Congruent Angles, Arcs, and Chords ___ ____ a. TV WS . Find mWS b. C J, and mGCD mNJM. Find NM HW: 12.2 Worksheet