4.1 ABCD is a cyclic quadrilateral. Prove that hat{B} and hat{D} are supplementary. 4.2 PR is a common chord of circles PQSR and PXRY. PR bisects hat{XRY}. T lies on chord PS such that ST=SR=SQ. MPY, a tangent, touches the larger circle at P.
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We have a cyclic quadrilateral ABCD, meaning its vertices lie on the circumference of a circle. We also have two circles, PQSR and PXRY, sharing a common chord PR. PR bisects angle XRY, and there's a tangent MPY touching the larger circle at P. Additionally, T Show more…
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