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Find Arc CFD using the given information depicted

 

 Jul 11, 2020
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Opposite angles of two crossing lines are equal    so 135 = 81 + DC      DC = 54

 

     a straight line is 180      so     81 + 54 + EF = 180     EF = 45          as is BC

         CFD = 45 + 45 + 135 + 81 = ........

 Jul 11, 2020

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