Daniel J Smith Custom TMUA alpha · Question 10

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Daniel J Smith Custom TMUA alpha · Q10

Logic & proofGeometry

$ABCD$ is a quadrilateral, labelled anticlockwise.

Which one of the following is a sufficient but not necessary condition for $ABCD$ to be a rectangle?

ABoth pairs of opposite sides are parallel and one interior angle is

90^\circ

BAll four sides are equal and one interior angle is

90^\circ

CThe diagonals are equal

DOpposite angles sum to

180^\circ

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