Point $I$ is the in-centre of triangle $CEN$.

If $\angle CEN=60°$ and $\angle ECN=68°$, then $\angle CNI$ is,

In the given figure, $△\mathrm{ABC}$ is an isosceles triangle, in which $\mathrm{AB}=\mathrm{AC}, \mathrm{AD}\perp \mathrm{BC}, \mathrm{BC}=6\mathrm{cm}$ and $\mathrm{AD}=4 \mathrm{cm}$. The length of $\mathrm{AB}$ is:

In $∆ABC, \angle A=58°$. If $I$ is the incentre of the triangle, then the measure of $\angle BIC$ is _____.

If $AD$ is the bisector of $\angle A$ of a triangle $ABC$ and $DL$ is parallel to $AB$ meeting $AC$ at $L$ and if $AB=6 \mathrm{cm}, BC=10 \mathrm{cm}$ and $AC=9 \mathrm{cm}$, then $\frac{Area (∆ABD)}{Area (∆ACD)}$ is:

Are angular bisectors of a triangle concurrent?

In triangle $ABC$, $AD$ is the angle bisector of $\angle BAC$. If $AB=c, AC=b$ and $BC=a$, then the measure of the segment $BD$ is equal to:

CF is the angular bisector of ∠ACB in ∆ABC. Does the angular bisector bisect the base AB such that AF = BF?

The number of angular bisectors in a triangle is

The bisector of $\angle \mathrm{B}$ in $∆\mathrm{ABC}$ meets $\mathrm{AC}$ at $\mathrm{D}$. If $\mathrm{AB}$ $=$ $10$ $\mathrm{cm}$, $\mathrm{BC}$ $=$ $11$ $\mathrm{cm}$ and $\mathrm{AC}$ $=$ $14$ $\mathrm{cm}$, then the length of $\mathrm{AD}$ is _____.