# Shapes 1

1. Common Shapes – Circles, Triangles, Rectangles and Squares
2. Properties of Common Shapes
3. Grouping Shapes

## 1. Common Shapes

Some shapes and their examples are given below:

Other items in the shape of a circle: ball, clock, and coin.

Other items in the shape of a triangle: slice of watermelon, flag, roof, and Christmas tree.

Other items in the shape of a rectangle: tissue box, television, keyboard, shoebox, door, handphone, table, bed, book, and red packet.

Other items in the shape of a square: pizza box, and square book.

Remember that all the sides of a square are equal, whereas, in rectangles, the opposite sides are equal.

### Spot and name the shapes in the picture

• Circle – clock, a picture on the wall, and drum.
• Square – cushions and a picture on the wall.
• Rectangle – three pictures on the wall, television, speakers, books, and TV console table.
• Triangle – designs on the cushions.

### Match it!

Amelia was tasked by her mother to buy items of the following shapes from the supermarket. Can you name the items to their correct shapes?

Solution:

Circle – watermelon and orange
Triangle – sandwich and a slice of pizza
Rectangle – milk and a bar of chocolate

Question 1:

Name the shape below.

1. Circle
2. Square
3. Rectangle
4. Triangle

(4) Triangle

Question 2:

Name the shape below.

1. Circle
2. Square
3. Rectangle
4. Triangle

(1) Circle

Question 3:

Name the shape below:

1. Circle
2. Square
3. Rectangle
4. Triangle

(2) Square

Question 4:

What is the name of this shape?

1. Square
2. Rectangle
3. Triangle
4. Circle

(2) Rectangle

Question 5:

Name the shapes in the figure below.

1. circle and rectangle
2. triangle and square
3. circle and triangle
4. rectangle and triangle

(3) circle and triangle

Question 6:

Sam used 2 shapes to draw the robot below. Name the shapes.

1. circle and square
2. triangle and square
3. circle and rectangle
4. rectangle and triangle

(3) circle and rectangle

Question 7:

How many squares are there in the figure below?

1. 5
2. 6
3. 3
4. 4

(3) 3

Question 8:

How many triangles are there in the figure?

1. 5
2. 6
3. 7
4. 8

(4) 8

Question 9:

Which group does not contain a square?

(3) Rectangle, circle, triangle, rectangle

Explanation:
1) Rectangle, circle, triangle, square
2) Rectangle, circle, square, triangle
3) Rectangle, circle, triangle, rectangle
4) Rectangle, circle, triangle, square

## 2. Properties of common shapes

Triangle - A triangle has 3 sides and 3 vertices. Vertices are the points where two sides meet.

Square – A square has 4 equal sides and 4 vertices.

Circle – Circles are round in shape.

Rectangle – A rectangle has 4 sides and 4 vertices.

Let’s Try This.

Put the shapes into the correct boxes that describe their properties.

Solution:

A triangle has 3 vertices.
A square has 4 equal sides.
A circle is round.

Question 1:

I have 3 vertices and 3 sides. What shape am I?

(1) Triangle

Explanation:

A triangle has 3 vertices and 3 sides.

Question 2:

I have 4 equal sides. What shape am I?

1. Square
2. Rectangle
3. Triangle
4. Circle

(1) Square

Explanation:

A square has 4 equal sides.

Question 3:

I do not have any vertices. What shape am I?

1. Square
2. Rectangle
3. Triangle
4. Circle

(4) Circle

Explanation:

A circle is round and does not have any vertices.

Question 4:

The figures below are of the same shapes. Is the statement true or false?

1. True
2. False

(1) True

Explanation:

They are both triangles.

## 3. Grouping shapes

We can group shapes based on their:

1. SHAPE

They can be grouped as:

1. SIZE

They can be grouped as -

1. COLOUR

They can be grouped as -

1. NUMBER OF SIDES AND VERTICES

They can be grouped as –

Question 1:

We can group shapes by __________, __________, __________, __________ and __________.

shapes, colours, sizes, sides and vertices.

Question 2:

How are the shapes below being grouped?

1. By size
2. By colour
3. By shape
4. By sides and vertices

(1) By size

Explanation:

The shapes in the first box are large in size, whereas the shapes in the second box are small in size.

Question 3:

How are the shapes below being grouped?

1. By size
2. By colour
3. By shape
4. By sides and vertices

(2) By colour

Explanation:

The shapes in the first box are blue whereas the shapes in the second box are yellow..

Question 4:

How are the shapes below being grouped?

1. By size
2. By colour
3. By shape
4. By sides and vertices

(3) By shape

Explanation:

The shapes in the first box are all triangles, whereas the shapes in the second box are all squares. Therefore, they are grouped by shapes.

Question 5:

Karen cut out some pieces of paper into different shapes and grouped them as shown below. Where should she place the paper below?

Group B

Explanation:

Karen should place the paper in Group B as they are the same shape: Square.

Question 6:

How many triangles and circles are there in the figure altogether?

1. 5
2. 7
3. 8
4. 9

(4) 9

Explanation:

There are 4 triangles and 5 circles.

$4 + 5 = 9$

Question 7:

How many triangles are there in the figure?

1. 6
2. 7
3. 8
4. 9

(4) 9

Explanation:

There are 8 triangles in the sun and 1 triangle beside the chimney.

$8 + 1 = 9$

## Challenge yourself

Question 1:

How many more squares than triangles are there in the figure?

1. 5
2. 7
3. 3
4. 4

(3) 3

Explanation:

There are 7 squares and 4 triangles in the figure.

To find the difference, we need to subtract 4 from 7.

$7 - 4 = 3$

Question 2:

How many more circles than rectangles are there in the figure?

1. 5
2. 2
3. 7
4. 9

(1) 5

Explanation:

There are 7 circles and 2 rectangles in the figure.

To find the difference, we need to subtract 2 from 7.

$7 - 2 = 5$

## Summary: Shapes and their Properties

Continue Learning
Numbers To 10 Picture Graphs 1
Shapes 1 Ordinal Numbers
Subtraction Within 20 Addition Within 10
Addition And Subtraction Within 10 Numbers To 20
Addition Within 20 Numbers To 100
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