Question

Not sure what to write.

Answer 1

I got that and drew another diagram so I can answer the second question. Yes, the size of angle ACB depends on the point C that you choose.

Answer 2

Is the whole point to the first question to say that the angles will all be under 180?

Answer 3

yes, and with angle BAC decreases or increases, ABC will increase or decrease depends on angle BAC

Answer 4

Its a triangle, some of all angle in the triangle is 180