Question

ABCD is cyclic .If angle B=70°,then find the measure of angle D=?​

Answer 1

R.E.F image

cyclic quadrilateral-

opposite angle are

equal for 11 sides

∴∠A+∠C=180

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& ∠B+∠D=180

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∴(∠B+∠D)=180

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∠D+∠B=180

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⇒∠D=180−70=110

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∠A=110

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=∠D &∠B=70

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(for parallel sides)

solution