angle 1 + angle 2 + angle 3 = 180 bc all 3 angles inside a triangle are 180
26 + angle 2 + 53 = 180
so angle 2 is 101 degrees
Angle 2 and angle 4 make a straight line. A straight line = 180.
Angle 2 + Angle 4 = 180
101 + Angle 4 = 180
Angle 4 = 79 degrees
Side note: this figure was not drawn to scale. I absolutely hate that.