1.

In the figure below, ABCD is a cyclic quadrilateral. If ZABD = 60° andZADB = 70°,then ZC=_Dс13.1 Mark70°60°АB​

Answer»

since ab||dc the SUM of opposite angles in CYCLIC QUADRILATERAL are SUPPLEMENTARY ie.180 angle abc=dcb =70 ab||dc angle abc+adc=180 adc=180-70=110=bad bad=adc=110 abc=dcb=70



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