Name: Parallel Lines: Illustrations
Uploaded: 2019-07-19
Duration: 4 min 57 s
Description: We know that parallel lines are lines that always stay the same distance apart, and a transversal is a line that crosses two or more other lines. Let us see some examples of parallel lines in this video.

Question

Consider the following lines. Which line is transversal? Number and list all the angles formed. Which are the exterior angles and which are interior angles?

Accepted Answer

In figure $1$ :

Here, line $p$ is intersecting given three parallel lines $l, m$ and $n$ .
We know that, a line which intersects two or more lines is transversal.
So, line $p$ is transversal.

There are total $12$ angles are formed by the above lines.
Interior angles are angles which lies inside region and exterior angles are angles which lies outside region.
From the above figure,
$∠ 3, ∠ 4, ∠ 5, ∠ 6, ∠ 7, ∠ 8, ∠ 9 and ∠ 10$ are interior.
$∠ 1, ∠ 2, ∠ 11 and ∠ 12$ are exterior.

For figure $2$ :

From the above figure,
Here, line $d$ is intersecting given three lines $a, b$ and $c$ .
We know that, a line which intersects two or more lines is transversal.
So, line $d$ is transversal.

Interior angles are angles which lies inside region and exterior angles are angles which lies outside region.
From the above figure,
$∠ 2, ∠ 3, ∠ 4 and ∠ 6$ are interior.
$∠ 1, ∠ 5, ∠ 7, ∠ 8 and ∠ 9$ are exterior.

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

1st Pair	2nd Pair	3rd Pair	4th Pair
$∠ 1 =___$	$∠ 2 =___$	$∠ 3 =____$	$∠ 4 =____$
$∠ 5 =____$	$∠ 6 =____$	$∠ 7 =____$	$∠ 8 =_____$

Consider the following lines. Which line is transversal? Number and list all the angles formed. Which are the exterior angles and which are interior angles?

Important Questions on Lines and Angles

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