ABC=180-135 (because there's the line AB)Find the angles ABC and ACB
ACB=180-(BAC+ABC), because the sum of angles of a triangle is 180.
http://en.wikipedia.org/wiki/Law_of_sines(a)Use the sine formula to find the distance between A and C and the distance between
B and C
See in the same link, the formula :Find The area of ABC
where S is the area