Draw the figures of the following quadrilateral : Trapezium

All congruent polygon are _____.

A circle is inscribed in quadrilateral ABCD, touching sides AB, BC, CD and DA at P, Q,R and S, respectively. If $\mathrm{As}=6\mathrm{cm},$ $\mathrm{BC}=12\mathrm{cm}$ and $\mathrm{CR}=5\mathrm{cm}$, then the length of AB (in cm) is

$\mathrm{SIDE}$ is a kite in which diagonals $\mathrm{SD}$ and $\mathrm{EI}$ intersect at point $\mathrm{O}$. Give reasons for the following:

$\angle \mathrm{DEO}=\angle \mathrm{SEO}$

$\mathrm{TURN}$ is a kite in which diagonals $\mathrm{TR}$ and $\mathrm{NU}$ intersects at point $\mathrm{O}$. Find the value of $x$ and $y$