Lesson video

So, let's look at what today's lesson is all about.

Today's lesson, we are going to be learning to describe the properties of 3D shapes.

Now I know that you've been doing 2D shapes, with Mr. Atherton earlier on in the week.

So this is really building on that work.

What do you need for today's lesson? Not very much.

A pen or pencil, and something to write on.

So pause the video and get that now, if you need to.

Here's a nice warm-up about some of the learning that we've already done, in previous lessons.

So I'd like you to say whether these statements are true or false.

So it says, all of these shapes are quadrilaterals.

Do you think that's true or false? Three of the shapes are rectangles, do you think that's true or false? The red shape is a square.

True or false? And just explain your answer.

So if you're going to say true, it's a square, because? Or false it's not a square, because? Pause the video here, and have a go at those three statements.

How did you get on, Year Three? Did you find that, that was quite easy? And that vocabulary came back to you quite quickly? Or do we need a little bit of a recap on this learning? Let's have a look together.

So the first question says, all of these shapes are quadrilaterals.

Mm, let me think.

What do I know about quadrilaterals? Well, quad like a quad bike has four wheels.

So quad means four.

And those, it's about shapes that have four sides, are called quadrilaterals.

Do all of those shapes have four sides? Well, they all look quite different, don't they? But actually they are all quadrilaterals.

That statement is true, they all have four sides.

What about the next statement then? Three of the shapes are rectangles.

Let me have a look.

Can I see three rectangles there? I can see that the blue shape is a rectangle.

And I can see that the yellow shape is also a rectangle, but I can't see a third one.

So that statement is false.

Maybe you thought there was just one rectangle.

Maybe you forgot for a moment that the yellow shape, the square, is also a rectangle.

All squares are rectangles.

What about that final one there? Is that red shape a square? Mm, what do I know about squares? I know that squares have four sides.

That they are quadrilaterals.

And that shape is a quadrilateral.

I know that squares have four right-angles.

Does that shape have four right-angles? No, that shape doesn't have four right-angles.

So it can't be a square.

That statement is false.

So that shape is not a square, that red shape, because it doesn't have four right-angles.

It's not a square, because it doesn't have four equal sides.

You can see that the sides are different lengths.

It's also not a square because a square has two pairs of parallel lines.

Have a look at that red shape.

How many pairs of parallel lines does it have? It has one pair of parallel lines.

Remember that parallel means that they stay an equal distance away from each other.

And the top and bottom of that shape are parallel.

The sites are not parallel.

If I imagine carrying on those lines, they will meet.

So they can't be parallel, they don't stay an equal distance away from each other.

How did you get on with those questions, Year Three? Really good work, with lots of new vocabulary, well done.

Okay, here are our words for today.

I'm going to say them, and if you could repeat them at home, that'd be wonderful.

3D.

Vertices.

Parallel.

Face.

Triangle.

Surface.

Rectangle.

Square.

Now, some of those words should be quite familiar, for all of you, from previous lessons, and others might be brand-new.

Don't worry, we're going to cover them all today.

And you'll be really confident in them by the end of the lesson.

Okay.

So here's some of that new vocabulary.

Let's look at it in a little bit more depth.

Now 3D might be one of those words that you hear quite a lot.

And you were talking about 2D with Mr. Atherton in previous lessons.

What does 3D mean then? Well, here we are.

Here is a 3D shape.

How is this different to the shapes you were looking at with Mr. Atherton yesterday? Hopefully you can see that it is solid, It has three dimensions, 2D shapes just have two dimensions, whereas this has three.

It's solid, I can hold it, I can touch it, I can move it, I can rotate it.

It's a solid shape.

How do we describe these solid 3D shapes then? That's where our other two pieces of vocabulary are coming in.

We have face.

Now face, is a surface.

A flat or curved surface of a 3D shape.

So this shape has flat surfaces.

But we're also going to look at shapes today, which have curved surfaces.

So faces are the flat or curved surfaces of 3D shapes.

What about that vertices, then? What are vertices? Vertices are the corners of 3D shapes.

The corners.

So where those faces meet, you have corners, and on 3D shapes, the correct vocabulary is vertices.

Okay.

How the 2D and 3D shapes compare, then.

Here's some 2D shapes that might be familiar from previous lessons.

How are they different to 3D shapes? Here are 3D shapes.

This is what 3D shapes look like.

And as I say, they look like this, they're solid, you can hold them.

So, on my slides today, you are going to see pictures of 3D shapes.

If we were in the classroom, I'd be giving you lots of shapes, and I'm going to show you, got lots of shapes all around me to show you, to touch them, to hold them, to move them around.

That's what makes it a 3D shape.

It's solid.

What you're going to see on my slides, are pictures of 3D shapes.

So it's just important to make that clear.

You're going to see the representation of 3D shapes, and I'm going to be holding and showing you solid 3D shapes.

Okay? Let's go through them.

Got lots and lots of shapes to show you, and we'll go through them slowly, and we'll talk about their properties.

So the first one is this one that I've been showing you.

What can we say about it? Here's some other pictures.

Maybe sugar often comes in this shape, and here's some other ones, blocks as well.

Wooden blocks.

My children have wooden blocks that they play with.

And these often come in this shape, Let's have a look at it in a little bit more detail.

It's got square- faces.

It's got six of them, six square faces, they're all square.

It's got eight vertices.

It is- a- do you know? We call it a cube.

And when I was looking around my house, I found a few examples of cubes.

Like I said, my children have square blocks, that they play with.

There's a bigger one.

And, we've got a- bit of a soft one here, as well.

But they all, small or big, colourful, have square faces, all six faces, all six are square.

and it has eight corners, eight vertices.

So that's our first shape, it's a cube.

Lots of cubes to look at.

We'll put the cubes down.

Okay.

Our next shape is quite similar to a cube.

It looks- so here's our cube, but here's our next shape.

It's a bit similar to a cube, Do you think you know what this one's called? I'll move our slides on, like this.

Not all the faces are square rectangles.

Some of them are bit different, they look like this.

So, here's some examples.

Tissue boxes often come in this shape.

And actually, when I was looking around my house, for some 3D shapes to show you, I could find lots, and lots, and lots of examples of this shape.

So, can look like this.

This is also the same shape.

Looks a bit different, bigger, not as thin, kind of wider.

But I think if you have a look around your house, you'd be able to find loads of examples of these.

Food boxes.

Cosmetic boxes.

Often in this shape.

This is a good one, this one looks a bit different, but it's also- got the same name.

Bit thinner, This is which, my yeast came in this, when I was making some bread, at home.

I wonder if you people have been doing any baking? So this shape is similar to a cube, in that it's got six faces.

All the faces are rectangles, and sometimes, those rectangles are squares.

Which is why I put that little star next to rectangles, 'cause they can be squares, but they're not all squares.

And this shape is called a cuboid.

As you're going around the house, maybe you're going back to school soon.

Have a look at whether you can find some cuboids, 'cause they are all around us.

Good one, box that my children's toys came in.

Boxes are often cuboids.

Get rid of those ones.

What's our next shape, then? So there's our cuboid examples.

What's our next shape? Well, this is a good one.

Now this is one that I could not find lots of examples of in my house.

But, as we're getting into summer, you might start seeing these around a little bit more.

I do have one here.

Bit different to the other shapes that we've been looking at, because it's got a curved surface.

I'll show you a little bit clearer.

It's got one circle surface, but it's also got a curved surface.

What's the shape called? It's a cone, an ice-cream cone.

This shape is a cone.

The only example I could find in my house.

No ice-cream cones in my house, unfortunately.

Okay, the next shape, I could find a few examples of.

What's this shape? Two circle faces, this time, the cone had one circle, right? This shape's got two circle faces, either end, they're parallel to each other.

And it's got that curved surface in between.

Here's another one.

A curved surface in between.

And sometimes toiletries, cosmetics and things do come in this shape.

We got little ones, two circle faces and a curved surface, and a bigger one.

Two circles, and a curve.

What's this shape called? Have a bit of a clearer look at some of the representations.

It's another one.

Tins, are this shape.

It is a cylinder.

This shape is a cylinder.

Okay, let's move on.

This is another shape that I couldn't find any examples of in my own house, but, we might find examples of, if we went to Egypt, Where is my shape? Here it is.

It's got a square bottom, it's got one square surface, and then it's got four, on each side of the square, it's got a triangular surface, a triangle surface.

What are these called? Five vertices, it's a square-based pyramid.

A square-based pyramid.

Just like the ones in Egypt, which the pharaohs lived in.

No, were buried in.

Sorry.

Okay.

Another shape, and we're coming on to my- chocolate.

This has got two triangle faces, when it hasn't been eaten, and three rectangle faces.

Here's another example of one, two triangles, and three rectangles.

Here's a smaller one, two triangles, And three rectangles.

This- is called a triangular prism.

A triangular prism.

Okay, your turn.

What shapes can you see here? Have a look at this slide.

And can you tell me, can you remember I once said what these shapes are called? And for a little bit of a challenge, can you describe that shape for me? Pause the video here, and have a go.

How did you get on? Were you able to name them all? Which ones did you decide to name first, I wonder? Which ones have stuck in your memory, and which ones can't you remember? Let's have a look at these together.

Most people remember the cube.

We see it a lot around, that 3D shape that's made up of six square faces.

We see lots of cubes, in the world around us.

Well done if you got cube.

What's the one underneath that, which we might put a bit of ice cream in the top of, can you see that that is a cone? That's a cone, where's my cone gone? A cone, with its circle top and it's curved surface, a cone.

The next one, remember, that one that we see lots and lots around us? Lots of boxes are, what are they? Cuboids.

Well done.

Those ones that we might see in Egypt, that we were just talking about, square-based pyramid.

And then that one with two circle faces, is a- cylinder.

And really, well done, if you are able to say why that shape is a cylinder.

It is a cylinder because it has two circle faces, and one curved face.

Well done if you were able to describe those shapes as well, Really good work, Year Three.

There's lots of new vocabulary here, lots of new learning today.

So I'll just leave that there for a minute, for you to have a look at.

Really good.

Okay.

It is time for the main activity now.

So, I'm just going to show you the first question, Just that you're clear of what I'm asking you to do.

So, which of these these shapes show 3D shapes? Now, remember these are drawings of 3D shapes, but which ones show a 3D shape rather than a 2D shape? Just tick them off, or say, oh, that one, that one and that one.

Okay, so pause the video here, and have a go at all of those independent tasks, please.

How did you get on? Did you find that easy? Is the new vocabulary sinking in, or do we need to do a little bit of revision together? Let's have a look.

So, hopefully, you could see that these shapes here, we've got our cube, we've got our square-based pyramid, This one we haven't talked about, actually, that is a sphere.

A ball is a 3D shape.

We've got a cylinder, and we've got a cuboid.

So well done, if you saw that all of those are 3D shapes.

Which of the shapes that we've looked at today, are actually missing there, and how good was your memory? Which ones that we looked at today, aren't in that picture? We also saw a cone, and a triangular prism, A cone, looks like this, our ice-cream cone, and our triangular prism.

My bar of chocolates comes in this sort of shaped box, and remember they looked like this.

Well done with those questions, great work.

Okay, let's look at Part B together, then.

So here you have to match up the description, with the picture, and then tell me what it is you're looking at.

With these questions, it doesn't matter what order you do them in, so pick which one you feel most confident with, and start there.

So maybe you started with the cube, or maybe you started with the cuboid.

You don't have to do them in the order they appear.

If you do them in the order you're happiest with, when you're left with an answer, or left with two options that join up, hopefully that helps you with those ones that you don't feel so confident with.

So, we have a shape here that has 5 faces, and 8 edges, and 5 vertices, it is our square-based pyramid.

We've got 8 vertices, 6 square faces and 12 edges, is our cube.

And then finally, 3 pairs of parallel rectangle sides.

Really well done, if you were able to match all those up well, and again, even better if you could remember what those shapes were called.

So we have our cuboid, our square-based pyramid, and finally, our- cube.

Really, really well done, if you managed to get all of those right.

Okay.

Pause the video here, and have a go at that final knowledge quiz, to see how you got on with today's learning.

Okay.

Well then, lots of new vocabulary there, and I think you've worked really, really hard.

Well done.

Have a great day, bye-bye.