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Question

in a quadrilateral PQRS <P:<Q:<R:<S=x:y:y:x
prove that PQRS is cyclic

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Solution

Dear student
Given a quadrilateral PQRS, P:Q:R:S=x:y:y:xWe know that in a quadrilateral sum of all angles in 360°So, x+y+y+x=360°2x+2y=360°x+y=180°Since sum of opposite angles is 180°, so it is a cyclic quadrilateral.
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