Intro Quiz: To identify and explain parallel lines

Video: To identify and explain parallel lines

﻿Hello, Miss Brinkworth here again with Oak National Academy doing your math lesson for you today and I've got another riddle for you. So are you riddle ready? What has got four fingers and a thumb, but isn't alive? What's got four fingers and a thumb and isn't alive? It's a glove! Let's have a look at today's lesson. So, we're moving on from perpendicular lines and today we're going to be identifying and explaining parallel lines. Don't worry if that word doesn't mean anything to you right now, it will by the end of the lesson, I promise. So let's have a look at what you need for today. Nothing too complicated, just something to write with and something to write on. Now we've got a lovely warm up here, a nice easy revision question, hopefully of all the work we've been doing on angles recently this is really easy. Can you name these angles? Name these angles. Pause the video here and have a go. Wonderful, well done year three, let's have a look at how you got on. Well, hopefully you can see that that first angle there on the left is quite a small angle. That means that the two straight lines that make it up are quite close together. That means, and it's smaller than a right angle, that means it is an acute angle. Well done if you remembered that one! That one in the middle is quite special, remember it has a square put in the corner and again really well done if you remembered that that is called a right angle. Really, really good! Its a quarter turn and we spent quite a lot of time in previous lessons looking at right angles. What is the last one we know then? What's that last special name we know for right angles? Well I can see that that angle is a lot larger than the right angle. It is wider, the lines are further apart than a right angle. Can you remember what those ones are called? Well done if you remembered that they are called obtuse angles. So those are three angles that we've spent quite a lot of time looking at over the last few lessons. Well done if you remembered them all! Moving on then. Here are our star words for today. There's not very many of them but I'll say them and if you can repeat them back to me that would be wonderful. So we've got lines, parallel, equal distance, and that's it! We're just having a look at these. I'm sure you know what lines are, parallel is our focus for today, and equal distance will be a really key part of our learning. So let's have a look at what we're talking about. Have a look at these lines, what do you notice about them? What can you tell me about these lines? Maybe you can tell me that they're blue. Maybe you can tell me that they're quite long lines. What about the relationship between the two lines, what do you notice? They are parallel lines. These are the same lines and they put little arrows in between them because they are parallel. So these are an example of parallel lines. What do you think parallel lines are then? If you remember part of our learning objective is to explain what parallel lines are. What do you think they might be having a look at those as an example? What do you think? Well here we are, here's the explanation, let's have a look at it together. Parallel lines are lines which are equal distance apart from each other at any point on the line. So what this means is, these are two lines which never get closer together or further apart, they remain the same distance away from each other. that's what parallel lines mean, they remain the same distance away from each other and to show you what they mean I've got some of my child's play train set here and if you can see this is the train track and its got two lines on it and those lines never get closer together or further apart those lines on there are parallel lines. We could move them round, we could make them horizontal, we can make them vertical, we can make them bigger or smaller but they remain parallel lines. I could show you another way as well. Another one here, these are parallel. They stay the same distance apart from each other. We can twist them round, we can make them further apart, as long as they remain the same distance away from each other in between. So that's an example of parallel lines. So let's go back to our learning. Here's some parallel lines. See the little arrows in between, those little dotted arrows are the same length all the way along because those blue lines stay the same distance away from each other all the way along that's what parallel means. Have a quick look at that. Moving on then, we can see that those blue lines are horizontal, what about if we have vertical lines then? What do you notice about these lines? Again, maybe you'd like to tell me about the colour, maybe you noticed their size or their distance apart, but these are still parallel lines. They still remain the same distance apart from each other and you can see they put those arrows in there to help you see. But this is what parallel means, two lines which stay the same distance apart. Do these look like parallel lines to you? What do you think? Do you think these lines have got the same distance in between them all the way down? You can shout at the screen if you like, do you think these lines are parallel? Let's have a look. We could put those lines in between and we can see that those lines are exactly the same length and they are parallel. So, these green lines aren't horizontal or vertical, but they are parallel. Have a quick look at those. Let's have another go then. What about these lines? Do you think these lines are parallel? What do you think? Do you think these lines are parallel?? Do they stay the same distance apart? Now when I'm looking at parallel lines, what I like to image is those lines carried on. If those lines carried on, would they touch? Cause if they would, they're not parallel. Or would they get further apart if we carried them on? That means they're not parallel. Let's have a look then. So if we put those arrows in between this one actually we can see that those little dotted lines are bigger and smaller than each other. That means that these lines are not parallel, they're not the same distance apart from each other all the way down. Lets just have a quick look at those. Those lines are not parallel. Well done if you saw that, that's really good work! And here's another way of looking at it. So as I said, if you could imagine those lines carrying on, if they would touch, they're not parallel. So that's another way of checking parallel lines. One of these sets of lines is parallel and one pair isn't, so just like perpendicular line, parallel lines come in pairs. Which of these pairs do you think is parallel and which isn't? Which one's parallel? Not too hard is it. Hopefully you can see that these are our parallel lines, they stay the same distance apart. They're not getting closer or farther apart from each other, they're staying the same distance apart. Well done if you saw that year 3, really good. Okay, here's another set of parallel lines then, or are they? Some are parallel, some aren't, which ones do you think are parallel and which ones aren't? Have a quick look at them, you can do thumbs up to the screen if you like, you can point to each one and just say yes or no if you think it's parallel or not. Have a quick look at those ones, but some of them are parallel and some aren't, how can you tell? Hmm, let's have a look then shall we. You should be able to see that the red ones over on the left here are parallel, they stay the same distance apart from each other, and so do those thin green ones, which are really close together, they stay at the same distance apart from each other too, these ones here. But these blue ones over on the right are also parallel, they stayed the same distance apart from each other. Really well done. But the other two pairs of lines, this purple pair at the bottom and this black pair at the bottom as well, they are not parallel. They are getting closer together or further apart. Well done if you saw that year 3, lots of different lines there some are parallel some aren't, really good work. Okay your turn then. Here's some more lines for you to look at. You just need to decide yes or no, true or false, thumbs up or down, which ones are parallel and which aren't? Pause the video here to have a go. Okay, how did you get on year 3, did you find that easy, is it easy to tell whether they're parallel or not? Which ones were easy and which ones were hard do you think? Let's have a look at them together. So this first set up here, they are parallel. They are the same distance apart. Sometimes it's a little bit confusing because those lines don't line up perfectly, one goes higher than the other, one goes lower than the other, but they are the same distance apart as they go down the page there, but those ones are parallel, well done if you saw that. These ones here going horizontally are also parallel so really well done if you saw that and we've got a final parallel set there as well. Those ones are diagonal, so when they go across like that it's called diagonal and lines don't have to be vertical or horizontal to be parallel they just have to remain the same distance apart from each other. They can be vertical, they can be horizontal, they can be diagonal, as long as the gap between them is an equal distance. They're not getting closer together, that wouldn't be parallel. They're not getting further apart, that wouldn't be parallel. They stay the same distance apart. Well done if you saw that year 3, really, really good work! Okay. Parallel lines can also exist within shapes. So, here's some shapes. Let's have a look at them quickly. Where do you think the parallel lines might be on these shapes? Well here are the shapes again and you can see that that rectangle at the bottom we've put in the green lines with little arrows on show that those two green lines are a pair of parallel lines, they're the horizontal ones, and that also down the side its got parallel, the two short blue parallel lines as well. That rectangle has two pairs of parallel lines. What about the other shape, do you think that's going to have two pairs of parallel lines as well? What do you think? This shape has just got one pair of parallel lines, those red ones that have been highlighted there. Really, really good work year 3. Lots of parallel lines to identify there. Okay, it's time for your independent activity now. Now I'm not going to go through it with you this time just because it's really similar to what we've already been doing, are they parallel or not and then spot the parallel lines within the shapes. So pause the video here and have a go at your independent activity. Okay well done! How did you get on, let's have a look. Okay, so which of these lines are parallel, some of them are and some of them aren't, I wonder how you got on. Are they staying the same distance away from each other? Let's see. Yup, the black ones do, they look just like train tracks don't they, those black ones? The yellow ones as well, although they're one goes further than the other at the end they're not the same distance as each same length as each other they've remained the same distance apart so those ones are parallel. The other lines on there are not parallel, just those two pairs are parallel. What about in these shapes then? Did you manage to spot the parallel lines in the shapes? Shape A has one pair of parallel lines as you can see there and B has got two pairs of parallel lines. So really, really well done year 3 if you saw those parallel lines on those shapes you're doing incredibly well, really, really good. Okay, on B then, which of these shapes has got parallel lines? Now there's lots of parallel lines to be seen on these shapes so we'll go through them together and hopefully you can spot them. So sometimes when we're talking about parallel lines we use this little symbol like this, which is just a little pair of parallel lines that we put on the line to show that they're parallel. So, this blue rectangle has got a pair of parallel lines opposite each other either side of the rectangle. That's not the only one though because we also know that the rectangle has got parallel lines here and here as well. Well done if you saw that, that's really, really good. Now, that pink triangle, we've come across this triangle quite a bit in the last few lessons, but that's when we were talking about right angles and perpendicular lines not parallel lines. That triangle doesn't have any parallel lines. What about, straight to number three then, what do you think? It's got parallel lines here and here, that's its pair. Do you think there'd be only one or do you think it's got more, what do you think? Nope, they're the only ones on that shape. This next shape is also a quadrilateral, that means its got four sides. Actually, its a shape called a parallelogram. Its called a parallelogram because its got two pairs of parallel lines, one pair here and one pair here. Well done if you saw those on that parallelogram. Our next shape here, has it got any parallel lines, do you think it's got two pairs or one pair or none? Let's have a look. Its got one pair here and here one pair of parallel lines. What about the next shape, this shape's really interesting, it's got quite a lot of parallel lines, I wonder if you managed to find them all. At the top and at the bottom there parallel, and then its got a pair here and here, and its got a pair, here and here. Lots and lots of parallel lines on that shape. So really well year 3 if you found all of these, you're doing brilliantly! Don't worry if you didn't find all of them this is new learning, keep at it, you're doing really, really well. Number seven has got parallel lines here and here and here and here. Really good. And finally we've got number eight, which has got parallel lines here and here. Fantastic work year 3 if you managed to find all of those parallel lines I'm very, very impressed. Okay, final question then what is our person saying today, true or false any pair of straight lines is called parallel. Hmm, now let me think, is that right, any straight lines are called parallel? But yesterday we were learning about perpendicular lines and that was a pair of straight lines so I don't think this can be right. I think this time our person's got that one wrong and the answer is false. Okay, your challenge today was this lovely map of St. Paul's Cathedral and it was can you spot parallel lines. Now I'm sure you can spot lots and lots of parallel lines in this shape. I'm not going to highlight them all because there's tonnes, but lets have a look at a few shall we. There is one here and here at the top and the bottom, there is one here and here at the ends. Where else do they exist? Here we go again, in thinner bit there in the more narrow bit top and bottom again horizontal parallel lines. Really well done if you found lots of parallel lines in that shape, fantastic work. Okay, that part of the lesson again. Have a go at the final knowledge quiz to see how you got on with today's learning. Well done year 3, you've worked brilliantly today on that new learning of parallel lines. Fantastic work, super impressive and I'll see you here for another lesson soon. Bye-bye!

Worksheet: To identify and explain parallel lines

Exit Quiz: To identify and explain parallel lines

Completed: To identify and explain parallel lines

In this lesson, we will be building on our knowledge of lines and angles to identify pairs of parallel lines. We will identify these individually and within 2D shapes, as well as looking in detail at their meaning.

Maths

To identify and explain parallel lines

Introductory Quiz

Video

Worksheet

Final Quiz

Lesson Complete