Official papers

Official 2019 Paper 2 · Q10

Paper 2Logic & proof

PQRSPQRS is a quadrilateral, labelled anticlockwise.

Which one of the following is a necessary but not sufficient condition for PQRSPQRS to be a parallelogram?

APQ=SRPQ=SR and PSPS is parallel to QRQR
BPQ=SRPQ=SR and PQPQ is parallel to SRSR
CPQ=QR=SR=PSPQ=QR=SR=PS
DPR=QSPR=QS

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