S K Gupta and Anubhuti Gangal Solutions for Exercise 4: Exercise

Name the pair of perpendicular and parallel lines in the following diagram

Name the pair of perpendicular and parallel lines in the following diagram:

Name the pair of perpendicular and parallel lines in the following diagram

Tell whether the statement is always, sometimes or never true.

Intersecting lines are parallel.

Tell whether the statement is always, sometimes or never true.

Intersecting lines are perpendicular.

Tell whether the statement is always, sometimes or never true.

Perpendicular lines are intersecting.

If a line $l$ is parallel to line $m$ and line $m$ is parallel to line $n$. What can say about lines $l$ and $n$?

If the line $l$ is not parallel to $m$ and line $m$ is not parallel to line $n$, does it follow that line $l$ cannot be parallel to line $n$, explain your answer by making a sketch.