If the figure given below, polygons are similar and the value of $\mathrm{OP}=k$ units, then find the value of $k$.

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The statement polygon $BCDEA~NOPLM$is not correct. Correct it.

If the given triangles are similar, then find the value of $x$ and $y$.

If the given quadrilaterals are similar, then find the value of $x$ and $y$.

If in the given pair of polygons are similar, then find the value of $x, y$ and $z$.