Which has only one pair of parallel sides?

How many quadrilaterals are there in the given figure?

The accompanying figure shows a right $+$ trapezoid $\left(\mathrm{AD}\parallel \mathrm{BC}\right)$ Based on this information and the information in the figure, the area of the trapezoid (in ${\mathrm{m}}^2$) is 

In the given figure, $ABCD$ is a rhombus in which $\angle c=60°$, then $AC:BD$ will be

A rectangle with $12 \mathrm{cm}$ and $4 \mathrm{cm}$, reformed into a Rhombus. Both diagonals of Rhombus are equal and one of its angle is ${60}^{\mathrm{o}}$. Find the Area of Newly formed Rhombus.