Internal dislocation angles are: 1,12; 4, 1 1

Ipsilateral internal angle: 412; 1, 1 1

(2) The isosceles angle of line B, line A and line C is:

The internal dislocation angle is: 3.5; 4,6.

The internal angles of the same side are: 4 and 5; 3,6.

(3) The isosceles angle of line A, line B and line C is:

The internal dislocation angles are: 5 and 9; 8, 12.

The internal angles of the same side are: 8 and 9; 5, 12