Question

cyclic trapezium is isosceles
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Answer 1

Hi buddy

Here is your answer

we need to prove that its opposite angles are supplementary (i.e. they add up to 180˚). We need to prove that ∠BAD + ∠BCD = 180 and ∠ADC + ∠ABC = 180˚. ... Since the opposite angles are supplementary, an isosceles trapezium is a cyclic quadrilateral.....

Hope it help you....