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Cubes, spheres and pyramids are 3-D shapes. Squares, circles and triangles are 2-D shapes.

Year 2 Shapes - Vocabulary

Learn the language of 2D shapes. Use clear words like side, vertex and polygon to name and describe shapes in simple, accurate KS1 Maths sentences.

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Fascinating Fact:

Polygon A 2D shape with only straight sides. Triangles, rectangles, and pentagons are polygons.

In KS1 Maths, pupils build a shapes vocabulary so they can describe and compare 2D shapes. They learn to talk about sides and vertices and to recognise when a shape is a polygon.

Key Terms

Polygon: A 2D shape made only of straight sides joined in a loop.
Side: A straight line on the edge of a 2D shape.
Vertex (corner): The point where two sides meet. More than one is vertices.

Practise now: open the Shapes Vocabulary game and test your words for polygons, sides and vertices.

Frequently Asked Questions (Click to see answers)

What is a polygon for KS1?

A polygon is a flat (2D) shape with only straight sides, such as a triangle, rectangle or pentagon. Circles are not polygons because their edges are curved.

How do I count sides and vertices on shapes?

Trace the outline and count each straight side. Then count each corner where two sides meet. For a square you get four sides and four vertices.

Is a circle a polygon?

No. A circle has one curved edge and no vertices, so it is not a polygon. Polygons must have straight sides and corners.

Try These Related Quizzes

To see a larger image, click on the picture.

Question 1

A cone has two faces, one of which is a...

rectangle

triangle

square

circle

The bottom of the cone is a circle

Question 2

Squares have 4 _____ which are all ____.

faces, long

sides, even

edges, curved

faces, different

A square is a kind of rectangle with even sides

Question 3

Cirlces don't fit together without spaces because...

they are too small

they are too big

their edges are curved

they are flat

Shapes such as squares have edges and corners which fit together well

Question 4

Which of these shapes has the fewest edges?

The pyramid

The cylinder

The cuboid

The cone

The cone only has one edge

Question 5

A cube has 6...

faces

edges

corners

vertices

A die (plural dice) shows the numbers 1 to 6, with a different number on each face

Question 6

Flat or drawn shapes are known as...

solid shapes

two dimensional shapes

colourful shapes

three dimensional shapes

Two dimensional shapes are shapes that only have two dimensions (such as width and height) and no thickness

Question 7

A sphere has no...

curves

colour

faces

edges

A sphere has one curved face, no edges and no corners

Question 8

These ____ are stacked in a _____.

spheres, row

cubes, pyramid

cylinders, square

cones, pile

This is similar to how the real pyramids were built

Question 9

Which of these shapes has three faces?

The pyramid

The cone

The cylinder

All of them

The cylinder has two circular faces and one curved face

Question 10

All of these shapes are...

two dimensional

large

three dimensional

on the ground

Three dimensional shapes have height, width and depth

You can find more about this topic by visiting BBC Bitesize - 2D and 3D shapes

Author: Angela Smith (Primary School Teacher & KS1 Quiz Writer)

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