Answer:
I'd love to answer your question!!!
It looks like you forgot to attach the picture or the connection failed D:
Could you post the question again?
Thx!
Sahkfam
Answer:
I don't remember well, and I'm not sure if this is correct, but, I think the answer is This is beacuse ∠FCD are facing with ∠CDG meaning it would be a same side interior angle.
Answer:
You can do this by dividing the radicand by the square number , and multiplying the radical by the root of that number.
e.g.

Y - 3 = 1/2 (x + 4)
y - 3 = 1/2 x + 2
1/2x + 2 = y - 3
1/2x - y = -3 - 2
1/2x - y = -5 answer