Intro Quiz: Describing positions on a 2D grid as coordinates

Video: Describing positions on a 2D grid as coordinates

﻿Hi there, my name is Miss Darwish. Welcome to this lesson on coordinates. But, before we could get started, if you could just make sure you are sat in a nice, peaceful quite environment, ready to start today's lesson. For this lesson, we're going to be introducing coordinates and seeing what coordinates are. Then, we're going to be plotting some points onto some coordinates. Then, we're going to be translating some points and shapes on coordinates. Then at the end of course, there will be a quiz for you to have a go at. Let's get started. In this lesson, you're just going to need a pencil and a sheet of paper or a notebook. Just something to write on. There is a treasure chest in front of us. How could you describe? Describe to me where the treasure chest is. You could say it's on a grid. What else? But where on the grid is the treasure chest? What do you think? Could I say it's towards the left of the grid? I guess it is towards the left of the grid. Is that specific enough though? If only this grid was labelled, so that maybe we could have something that looks like this where each square had a letter. Then, you could tell me exactly where the treasure chest was. But, that would take a very, very, very long time to start labelling every square on a grid. Even if our grid was bigger, A, B, C, D, E, F, G, H, I et cetera, et cetera. How else could you describe the position of the treasure chest on the grid? We could use something called coordinates. Have you heard of coordinates before? What coordinates are is we have some axes. The pink line at the bottom is called the X axis. What's it called? The X axis. These are numbered. You can see one, two, three, four, five, six, all the way through to 10. That pink line is called the X axis. Now, there are three points on our grid. We can say that all three points have an X axis of two. Can you see why? All three points have an X axis of two. If you have a look at two and you move up, you can see where all three points are. Do you agree? What about these three points? What do they have an X axis of? What about these three points? What do you think? They have an X axis of six. Can you see that? All three of them have an X axis of six. What do they have an X axis of? Six. Well done. Now that we've looked at the X axis, this is called the Y axis. That's in green for you. There are three points and they all have a Y axis of? Four. If we look across where the Y axis of, where the Y axis is, they all have a Y axis of four. What about these three points? What do you think? Tell me. Seven. Well done if you said seven. You can see where the seven is on the Y axis and all of them lie on that line. Now, let's put the X axis with the Y axis. We've got the X axis nice and pink and the Y axis in green. Now, this time, we've got a different point on the grid. If you were to describe the position of that point for me on the grid, you would first of all tell me the X axis and then the Y axis. We would also put it in a bracket just like the one below you can see. We start with X and then Y. We can see this point has an X of? It's four on the X axis. Well done. On the Y axis? Five. We would call that . Well done if you've got that right. Easy right? You have a go now. What would this coordinate be? Remember, we start with the X. What's that? Nine. Well done. Then, what's the Y across? Three. Good. If you said , give yourself a little tap on the back. Well done. Here's another one because you're getting good at this now. What do you think? . Well done. X of one and Y of seven. Well done. What about this one? Maybe this one is slightly trickier? What's the X? Six. It's literally sat on the X axis, so that's nice and easy. But then, where is it on the Y axis? It's not one. It's below one. It's zero. Six on the X. Zero on the Y. Well done if you said . Now, we are able using coordinates, using an X axis and a Y axis to be more specific when we say where something is on a grid. This time, I want you to find the point for me. Remember, we start with the X axis. Can you find the three? Put the finger on it. Then, I want you to keep going up until it gets to seven on the Y. Have you done that? Sure? Well done if your finger is where the X is. Well done. . Okay, now I've got something for you to do. I want you to translate this point. Six right. Six spaces to the right, and two spaces down. Six spaces to the right and two down. Should we do this one together? You need to count with me. You ready? Okay, let's go. One. What would the new coordinate be? Let's have a look. One, two, three, four, five, six to the right. And how many down? Two down. One, two. What's the new coordinate? . Well done if you said . The black X is the original one. The one in purple or lilac is where it's been translated. The new coordinate is . Let's do another one. Find the point and then put your finger on it once you've found it. Let's see if you're right. Well done. . Keep your finger there. Let's see what we're going to do next. Translate this point three left and six up. Three left and six up. Now that your finger is there, move it three spaces to the left and six to the right. Six up, sorry. Made a mistake. Three spaces to the left and six up. Leave your finger there and then we'll do it together and see if your finger is in the same place as the translated point. You ready? You have a go. Let's see. Let's do this together. Let's see what the new coordinate is going to be. Three left and six up. One, two, three. That's three left. Now, six up. One, two, three, four, five, six. Is that where you're finger is? Well done. What is that new coordinate? How do we say it? Remember to start with the X axis and then the Y axis. , well done. Give yourself a nice little tap on the back if you got that right. is the new translated coordinate. Well done. Hope you didn't find that too difficult. What I'd like you to do is you've got a task to do. It's a statement that my friend has made. You need to see if my friend is right or wrong and why. The explaining why is the most important part. If you want to pause the video now, have a go and come back for the answers. Welcome back. Hopefully you didn't find those too tricky and they were okay for you. Let's have a look at the answers together. First of all, we have a grid with of course an X axis and a Y axis. There is a point on the grid. The question says that my friend says if I translate that point there, four spaces to the right and one space down, then the new coordinate is . Did you find that as well? Is my friend right or wrong? Let's have a look. First of all, what is that coordinate? What would we call it? . Well done if you said . We're saying four to the right. One, two, three, four. That's four spaces to the right. One space down. Is that coordinate ? You thumbs up or a thumbs down? What do you think? Thumbs up if you agree with my friend, it's , the new translated coordinate. Or, thumbs down if you disagree. The translated coordinate is , not like my friend thought. What mistake did she make? I think maybe my friend did correctly translate the point, but she read the coordinate out incorrectly. She didn't read it out right. She read the Y axis and then she read the X axis. But, we don't do that, do we? We always start with the X and then the Y. She thought it was , but it's not. It is . Well done if you spotted that. I would love for you to share your work with us here at Oak National. Please, please ask your parent or your carer's permission and see if they can share your work on to Twitter for us. Don't forget to tag @OakNational and use the hashtag #LearnwithOak. I would really love to see the work that you did on translating points onto coordinates. Well done on all the work that you've done today. If you're now ready and go complete the quiz, that would be brilliant. Good luck.

Worksheet: Describing positions on a 2D grid as coordinates

Exit Quiz: Describing positions on a 2D grid as coordinates

Completed: Describing positions on a 2D grid as coordinates

Introduces students to the 1st quadrant in coordinates and describes new points when they have been translated.

Maths

Y5 Maths

Key Stage 2

Year 5

Miss

Describing positions on a 2D grid as coordinates

Transformations

Geometry

THEME

UNIT

Identifying, describing & representing the position of a shape following a translation

Describing the position of a point and translating it across 2 quadrants using coordinates

Describing the position of a point and shape across 4 quadrants using coordinates

Using coordinates to describe position following a translation

Identifying, describing & representing the position of a shape following a reflection

Maths

Describing positions on a 2D grid as coordinates

Introductory Quiz

Video

Worksheet

Final Quiz

Lesson Complete