Measure the angles using a protractor and fill in the table with the pairs of corresponding angles.

1st Pair	2nd Pair	3rd Pair	4th Pair

Measure the angles using a protractor and fill in the following table with the pairs of corresponding angles.

Observe the figure, by checking corresponding angles, which lines are parallel?

If the pair of alternate interior angles are equal then the lines are _____ .

In adjacent figure, the lines $l$ and $m$ are parallel and $n$ is transversal. 

In adjacent figure, the lines $l$ and $m$ are parallel and $n$ is transversal. 

If $\angle 2=90°$, then $\angle 8=$_____$°$.