In $△ABC$, if $3\angle A= 4\angle B=6\angle C$, calculate $\angle A, \angle B$and $\angle C$.

In $△ABC$,  if $\angle A+\angle B=108°$and $\angle B+\angle C=130°$, Find $\angle A, \angle B$ and$\angle C$.

In $△ ABC$, if $\angle A+\angle B=125°$and $\angle A+\angle C =113°$, Find $\angle A, \angle B$ and $\angle C$.

In $△PQR$, if $\angle P-\angle Q=42°$and$\angle Q-\angle R=21°$, Find $\angle P, \angle Q$ and $\angle R$.

The sum of two angles of a triangle is $116°$ and their difference is $24°$. Find the measure of each angle of the triangle.

Two angles of a triangle are equal and the third angle is greater than each one of them by $18°$. Find the angles.

Of the three angles of a triangle, one is twice the smallest and another one is thrice the smallest. Find the angles.

In a right-angled triangle, one of the acute angles measures $53°$^. Find the measure of each angle of the triangle.

If one angle of a triangle is equal to the sum of the other two, show that the triangle is right angled.