In the diagram below of circle O with diameter BC and radius OA, chord DC is parallel to chord BA. C If MZBCD = 30°, determine and state mZAOB. In the diagram below, chords PQ and RS of circle O intersect at T. Which relationship must always be true? 1) RT = TQ 2) RT = TS 3) RT+ TS = PT+ TQ 4) RTx TS = PT x TQ CHOICE # (4) In the diagram shown below, PA is tangent to circle Tat A, and secant PBC is drawn where point B is on circle T. T B If PB = 3 and BC = 15, what is the length of PA? %3D

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