in the diagram below, angle ADC=50. Find the angles X and Y, giving the reasons for it
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x is 100 and y is 130
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angle AxC = 2×angle ADC = 2×50=100
and angle ADC+angle ABC = 180' because it is a cyclic quadrilateral hence y= 130'
and angle ADC+angle ABC = 180' because it is a cyclic quadrilateral hence y= 130'
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