8. Construction of parallel lines

 

Step $2$: Mark a point $T$ anywhere on the line $XY$.

 

Step $3$: Place the set square in such a way that the vertex of the right angle coincides with $T$ and one of the edges of right angle lies along $XY$. Mark the point $S$ such that $ST = 3.6 cm$.

 

Step $5$: Now draw a line through $S$ and extend it to $R$ using set square.

 

Step $6$: The line $SR$ is parallel to the line $XY$. That is, $SR \parallel XY$.

 

Step $2$: Mark two points $X$ and $Y$ on the line segment.

 

Step $3$: Place the set square above the line $XY$in such a way that one of the arms that form a right angle lies along $XY$ and coincide with the point $A$. Measure the length of $4 cm$ along the another arm and mark it as $A$.

 

Step $4$: Now move the set square along the line $XY$ until its vertex point coincide with $Y$.

  

Step $5$: Now draw a line through $P$ and extend it to $Q$. Again, measure the length of $4 cm$ along the another arm and mark that as $B$. Now joint the points $A$ and $B$ by drawing the line.

 

Step $6$: The line $AB$ is parallel to the line $PQ$. That is, $AB \parallel PQ$.