Question Video: Identifying Parallel and Perpendicular Lines | Nagwa Question Video: Identifying Parallel and Perpendicular Lines | Nagwa

# Question Video: Identifying Parallel and Perpendicular Lines Mathematics

Complete using “parallel” or “perpendicular”: The two red-colored lines are ＿.

01:36

### Video Transcript

Complete using “parallel” or “perpendicular”: The two red-colored lines are what.

This is an interesting four-sided shape, isn’t it? You might not know the name of it, but it doesn’t matter, because in this question, all we need to think about are the two red-colored lines that we can see that make up the sides of the shape, here and here. Now, we need to describe these two lines. And we’re told that we have to complete the sentence using either the word “parallel” or “perpendicular.” Do you remember what these two words mean?

Parallel lines are always the same distance apart. They can never ever cross. But perpendicular lines do touch. In fact, they meet at right angles. And if we look at our two red-colored lines, we can see straightaway that they don’t meet at right angles. In fact, they’re not touching at all, are they? They must be the same distance apart. Now, if we look at the top and the bottom of the two red lines, it does look like they’re the same distance apart. But without a ruler, how can we tell?

Well, there’s a clue in the picture. We know that whenever we see a pair of lines labeled using arrow heads like this, they are parallel. So we can see that they’re the same distance apart. But we can also see that they’ve been labeled to show this. The two red-colored lines are parallel.

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