Watch: 2D shapes
These guys are 2D shapes and 2D shapes are everywhere.
Shapes have sides and corners and are completely flat, like a drawing on a piece of paper.
Circles don’t have corners and have got just one long round side. Wheels, they're circles and are one of the most important inventions ever. And doesn't he know it.
Triangles. Like a slice of pizza, and sandwiches. They’ve got 3 sides.
Square, 4 equal sides. You see squares in the faces of a dice and cheese crackers.
Rectangles, similar to squares, but have 2 long sides and 2 shorter sides. Books. TVs. Postcards.
Pentagons, 5 sides. You can see these in the black shapes in the patterns on a football.
Hexagons, 6 sides. Er…honeycomb, and the ends of pencils.
Octagons, 8 sides! Stop signs on the side of the road; they're octagons.
Oh…oh…bit rude.
What are 2D shapes?
A 2D or two-dimensional shape cannot be picked up. 2D shapes can be found printed in a book or on a website, or you can draw them on a piece of paper.
Here are some you might know:
What are properties of 2D shapes?
2D shapes have sides and vertices.
A vertex is a point where two or more lines meet. The plural of vertex is vertices.
The number of sides and vertices are the properties of a shape.
Sides and vertices
Let's have a look at the sides and vertices on these shapes.
A triangle has 3 sides and 3 vertices.
The square has 4 sides and 4 vertices.
The hexagon has 6 sides and 6 vertices.
Remember
A 2D shape is a flat shape with sides, vertices and sometimes lines of symmetry.
If the sides and vertices on a shape are all the same, the shape is regular.
A square is a type of rectangle.
Activity 1
Try matching the number of sides to the shapes.
Quiz
Quiz
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