11. Find m\angle C in Fig 3.33 if \overline{AB} || \overline{DC}.

    

Answers (1)

Given , \overline{AB} || \overline{DC} 

\angle B+\angle C=180\degree       (Angles on same side of tranversal)

120\degree+\angle C=180\degree

\angle C=180\degree - 120\degree

\angle C=60\degree

Hence,m\angle C=60\degree.

 

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