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.
