Video: Comparing 2D Shapes

In this video, we will learn how to describe and compare 2D shapes using simple language.

06:44

Video Transcript

Comparing 2D Shapes

In this video, we will learn how to describe and compare 2D shapes.

What do we know about 2D shapes? We usually identify 2D shapes by the number of sides they have or the number of corners they have. Let’s see if we can name this shape. How many sides does it have? How many corners does it have? When we’re thinking about sides, we’re looking for straight sides. This shape doesn’t have any straight sides, and it doesn’t have any corners. Have you guessed its name yet? It’s a circle.

How many sides does this shape have? One, two, three. Now, let’s count the corners. One, two, three. This shape has three sides and three corners. It’s a triangle.

Do you know the name of this shape? Did you count the sides? This shape has four sides and they’re all the same. Let’s count the corners. One, two, three, four. This shape has four sides, which are all the same, and four corners, which are all the same. Have you guessed? It’s a square.

Like a square, this shape has four sides. It has two short sides and two long sides. And like a square, it has four corners, which are the same. Four sides, four corners, two long sides, two short sides. This is a rectangle.

What’s the name of this shape? Let’s count the sides. There’s one, two, three, four, five, six. Now, let’s count the corners. It has one, two, three, four, five, six. It’s a hexagon. When we describe or compare 2D shapes, we count the number of sides or corners. Let’s practice describing and comparing 2D shapes.

Which shape is the odd one out?

We’re shown four different 2D shapes. Which one is different? Our first shape has three sides, and it has one, two, three corners. The second shape has one, two, three, four sides, and it has four corners. This shape also has four sides and four corners. And this shape also has four sides and four corners. Can you see which of the shapes is different? It’s this shape. It has three sides and three corners. All of the other shapes have four sides and four corners. This is a triangle. The other shapes are rectangles.

A hexagon has what corners than a rectangle. Does it have more corners or less?

To help us answer this question, we need to count the number of corners a hexagon has and the number of corners a rectangle has. A hexagon has one, two, three, four, five, six corners. How many corners does a rectangle have? One, two, three, four. A hexagon has six corners and a rectangle has four. Six is more than four. A hexagon has more corners than a rectangle.

Use the clues to find the shape. The shape has four sides. The corners are not all the same.

We’re shown three different shapes. We have to find the shape that has four sides, but its corners are not all the same. The first shape has four sides. One, two, three, four. The second shape has four sides, but this shape only has three sides. So, we know this is not the shape we’re looking for. We found two shapes with four sides. The corners on this shape are not all the same. We found the shape that has four sides whose corners are not all the same.

What have we learned in this video? We’ve learned how to describe and compare 2D shapes using the number of sides and corners.

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