What are the measures of the angles of an isosceles triangle in which each of the base angle is double the vertical angle.

What are the measures of the angles of an isosceles triangle in which each of the base angle is thrice the vertical angle.

Find the lettered angle in the below figure:

Find the lettered angle in the following figure:

Find the lettered angle in the following figure:

If the value of angle $x$ is $k°$ in the following figure then find the value of $k$.

In the figure, $LM=LN, \angle FNL=110°$. If the value of  $\angle LMN$ is $k°$ then find the value of $k$.

In the figure, $LM=LN, \angle FNL=110°$. If the value of $\angle MLN$ is $k°$ then find the value of $k$.

$O$ is the centre of the circular arc $ABC$. Find the angles of $△ABC$.