M L Aggarwal Solutions for Exercise 2: Multiple Choice Questions

In a $△ABC, AB=3 \mathrm{cm}, BC=4 \mathrm{cm}$ and $CA=5 \mathrm{cm}$. If $D$ and $E$ are mid-points of $AB$ and $BC$ respectively, then the length of $DE$ is

In the adjoining figure, $ABCD$ is a rectangle in which $AB=6 \mathrm{cm}$and $AD=8 \mathrm{cm}$. If $P$ and $Q$ are mid-points of the sides $BC$ and $CD$ respectively, then the length of $PQ$ is

$D$ and $E$ are mid-points of sides $AB$ and $AC$ of $△ABC$ and $O$ is any point on the side $BC$. $O$ is joined to $A.$ If $P$ and $Q$ are mid-points of $OB$ and $OC$ respectively, then $DEQP$ is

The quadrilateral formed by joining the mid-points of the sides of a quadrilateral $PQRS$, taken in order, is a rectangle if

The quadrilateral formed by joining the mid-points of the sides of a quadrilateral $ABCD$, taken in order, is a rhombus if

The figure formed by joining the mid-points of the sides of a quadrilateral $ABCD,$ taken in order, is a square only if