Angle GFE= feed angle with the same internal dislocation angle (AD//BC)
So angle GEF= angle GFE, so triangle EFG is an isosceles triangle.
That is, the overlapping part shape triangle EFG is an isosceles triangle.
2) Angle AED' = 180-2 Angle EFB =180-1/kloc-0 = 70 degrees.
3) Because angle AEF+ angle EFB= 180, that is, angle AEG+ angle GEF+ angle EFB= 180.
Therefore, the relationship between Angle ·EFB and Angle and is:
Angle EFB+2 Angle AED' = 180