There are 4516,8 and o, 2 and o.

The ipsilateral internal angles are 15, 46, 5 and o, 1 and o.

Three lines have eight angles. First of all, we must know which two straight lines are cut by. Let's take a look at the positional relationship. The same position-the same position, the wrong inside-the two sides of the secant are staggered, and the same side-the two lines are inside and the secant is on the same side. You missed OA and the CD line was cut by OB. OB and CD are cut by OA. You should understand this time!