As Angle(2) and Angle(3) are Vertically Opposite Angles, they should be Equal.
Let us Take Angle(2) = Angle(3) = X
The Opposite Angle to 58° will also be 58° as they are Vertically Opposite Angles.
We can Notice that Angle(2), Angle(3) and Both the 58° Angles together make a Complete Angle (i.e. 360°)
⇒ Angle(2) + Angle(3) + 58° + 58° = 360°
⇒ Angle(2) + Angle(3) + 116° = 360°
⇒ Angle(2) + Angle(3) = 360° - 116°
⇒ Angle(2) + Angle(3) = 244°
⇒ X + X = 244°
⇒ 2X = 244°
⇒ X = 122°
We took Angle(2) = Angle(3) = X
⇒ Angle(2) = Angle(3) = 122°
Now let us go for the Upper Triangle :
As Sum of Angles in a Triangle = 180°
Angle (1) + Angle(2) + 22° = 180°
Angle (1) + 122° + 22° = 180°
Angle (1) + 144° = 180°
Angle (1) = 180° - 144°
Angle (1) = 36°
Now let us go for the Lower Triangle :
As Sum of Angles in a Triangle = 180°
Angle (3) + Angle(4) + 20° = 180°
Angle (4) + 122° + 20° = 180°
Angle (4) + 142° = 180°
Angle (4) = 180° - 142°
Angle (4) = 38°