6. Four triangles are shown. One side of each triangle lies on a ray, and the triangles are not drawn to scale.
x = 160, because 180 - (130+30) = 20 and 180 - 20 = 160
56
60°
x = 80, because 180 - 130 = 50 and 50 + 30 = 80
35
91°
60°
120°
x = 20, because 130 + 30 = 160 and 180 - 160 = 20
x = 340, because 130 + 30 = 160 and 160 + 180 = 340
30°
120°
20°
1400
1300
Based on these triangles, which statement about x is true?