What are the minimum number of elements required to construct a general triangle? (Write the answer in numerals)

$\angle \mathrm{BOC}$ is drawn with same arcs. If the measure of $\angle \mathrm{BOC}=k°$, then find $k$.

In the given figure the measure of $\angle \mathrm{BOC}$ is $k^{\circ }$.  Find the value of $k$.

In the figure angle $90°$ is constructed by bisecting which angle? $\left(\mathrm{BYZ}/\mathrm{XYZ}/\mathrm{BYC}/\mathrm{XYC}\right)$

In the figure, $\mathrm{AB}=10 \mathrm{cm}$. If  measure of $\mathrm{MB}=k \mathrm{cm}$, what is the value of $k$.