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

51°

Concept Used

Sun of all angles of a triangle is \({180}^\circ\).

Calculation

Let angle 1 = angle 2 = x

Now,

x + x + \({78}^\circ\) = \({180}^\circ\)

2x = 180 - 78

2x = 102

x = 51

Therefore, the answer is \({51}^\circ\).