Question

prove that isosceles trapezium is always cyclic​

Answer 1

Answer:

To prove that any given quadrilateral is cyclic,

we need to prove that its opposite angles are supplementary

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. Hence proved.