Is every rectangle a parallelogram? Is every parallelogram a rectangle? Explain.

Can you draw the quadrilateral $\mathrm{ABCD}$ (given above) by constructing $△\mathrm{ABD}$ first and then fourth vertex $\text{'}\mathrm{C}\text{'}$? Give reason.

Can you construct the above quadrilateral $\mathrm{PQRS}$, if we have an angle of $100°$ at $\mathrm{P}$ instead of $75°$ Give reason.

(Draw a rough sketch in each case and analyse the figure) State the reasons for your conclusion.

Can you construct the quadrilateral $\mathrm{PLAN}$ if $\mathrm{PL}=6 \mathrm{cm}$, $\mathrm{LA}=9.5 \mathrm{cm}$, $\angle \mathrm{P}=75°$ , $\angle \mathrm{L}=15°$ and $\angle \mathrm{A}=140°$ .

(Draw a rough sketch in each case and analyse the figure) State the reasons for your conclusion

Do you construct the above quadrilateral $\mathrm{ABCD}$ by taking $\mathrm{BC}$ as base instead of $\mathrm{AB}$? If So, draw a rough sketch and explain the various steps involved in the construction.