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OpenStudy (anonymous):
PLEASE HELP!!!: In circle Q, AB is parallel to EF and the arcs between EF and CD are congruent. Prove that the arcs between AB and CD are congruent. If arc AB measures twice that of arc CD and arc AC measures 105 degrees, what is the measure of arc CD? 178 degrees 90 degrees 356 degrees 89 degrees http://assets.openstudy.com/updates/attachments/4e9b678d0b8ba77642b30a30-abbylafaverox-1318807530115-mygeometry.gif
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