Exemplar Exercise Problems II — task. Mathematics CBSE, Class 9.

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1.

$ABCD$ is a rhombus such that

$∠ACB = 40^o$ . Then

$∠ADB$ is

$50^{\circ}$
$60^{\circ}$
$45^{\circ}$
$40^{\circ}$

2. The quadrilateral formed by joining the mid-points of the sides of a quadrilateral

$PQRS$ , taken in order, is a rectangle, if

$PQRS$ is a parallelogram
diagnols of $PQRS$ are perpendicular
diagnols of $PQRS$ are equal
$PQRS$ is a rectangle

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