To put it bluntly, are you too lazy? Or do I think this question is too simple? I think how keen I am on mathematics, and it is such a problem. . . . . . .

1。 Angle 5, 6

2。 Corner DAE, 9

3。 Horn number four and horn number seven. 2,6 internal dislocation angle

The inner corner of the same side, DC and AB are connected by AD.

. . . . . . . . . . . . . .

Anyway, I hope I can help you!

You must study hard!