Parallel Lines
1. Create line AC.
2. Create a circle with a center at A that goes through C.
3. Create point D at the intersection of the circle and line AB.
4. Create a circle with a center at C that goes through A.
5. Create a circle with a center at D that goes through A.
6. At the upper right corner, the circle with center at D through A intersects the circle with center at C through A intersect. Create point E at that intersection.
7. Draw line CE.
Line CE is parallel to line AB.