Find the length of diagonal of a square with side $8 \mathrm{cm}$.

Referring the adjacent figure of a parallelogram, write the answer of question given below.

If $l\left(WZ\right)=4.5 \mathrm{cm}$ then $l\left(XY\right)=k \mathrm{cm}$. Find $k$.

Referring the adjacent figure of a parallelogram, write the answer of question given below.

If $l\left(YZ\right)=8.2 \mathrm{cm}$ then $l\left(XW\right)=k \mathrm{cm}$. Find $k$.

Referring the adjacent figure of a parallelogram, write the answer of question given below.

If $l\left(OX\right)=2.5 \mathrm{cm}$ then $l\left(OZ\right)=k \mathrm{cm}$. Find $k$.

Referring the adjacent figure of a parallelogram, write the answers of question given below.

If $\mathrm{l}\left(\mathrm{WO}\right)=3.3 \mathrm{cm}$ then $\mathrm{l}\left(\mathrm{WY}\right)=?$ (Write the answer without unit)

$WXYZ$ is a parallelogram. If $\angle WZY=120°$ then find $\angle WXY$ and $\angle XWZ$.