Answer:
x = 121°
Explanation:
The sun of all angles in a triangle is 180°
Since a circle has 360°, and 360 - 304 = 56, 56° is the top angle.
Since a striaght line has 180°, and 180 - 115 = 65, 65° is the left angle.
And since 180° - (56° + 65°) = 59°, 59° is the last angle.
But since x is on the outside, you have to subtract 180° from 59°, because they lie on a straight line. 180° - 59° = 121°.