Question : An exterior angle of a triangle is 115° and one of the interior opposite angles is 45°. The other two angles are:

Question : If $\cos (A-B)=\frac{\sqrt{3}}{2}$, and $\cos (A+B)=0$, where $A$ and $B$ are positive acute angles and $A \geq B$, then the measures of $A$ and $B$ are:

Question : The difference between the largest and the smallest angles of a triangle whose angles are in the ratio of 5 : 3 : 10 is:

Question : Two angles of a triangle are equal and the third angle measures 78°. What is the measure of each of the unknown angles?

Question : If the sum and difference of two angles are 135° and $\frac{\pi}{12}$, respectively, then the value of the angles in degree measure is: