
We have two points:

The point slope form of the line:

Substitute


Answer:

I'm going to assume you just mean how do you write the ratio, in which case the answers vary
18:6
18 to 6
or
18/6
CPCTC means the corresponding parts of congruent triangle that are congruent.
So, angle GAE is approximately equal to angle GEA.
The answer is that I think it is 5