### Draw a line parallel to the line $AB$ and passing through $C$ such that $C$ is a point outside $AB.$

1. Draw a line segment $AB$ and take a point $C$ somewhere above the line $AB.$ Join $AC.$
2. With $A$ as center, draw an arc of suitable radius cutting $AB$ at $D$ and $AC$ at $M.$
3. With $C$ as center and same radius as in step $2,$ draw an arc $EF$ cutting $CA$ at $G.$
4. Now, place the compass at $D$ and adjust the pencil such that the radius equals $DM$. With the same radius, draw an arc with $G$ as centre cutting the arc $EF$ at $H.$
5. Join $CH$ and extend that line to both sides and name it $L.$ Line $L$ is parallel to $AB.$