5
Fun with Shapes
Something is
wrong. Our rangoli is
not like my
Amma’s rangoli.
Amma made a
pretty rangoli with dots
and shapes. Let us also
make it on paper
Let us Do
1. Make Amma’s rangoli on the dots given below.
2. Name the shapes drawn in Amma’s rangoli:
_____________,_____________, _____________
3. How many shapes are made with
(i) Curved lines ______________
(ii) Straight lines ______________
4. Use cut outs of shapes to make a rangoli design. Outline the object and colour.
5. Try to make the following objects using shape cutouts.
Teacher’s Note:
Encourage children to use cut outs of shapes creatively. Let children compare two rangolis and discuss their similarities and differences.
Let us Do
I want to make a gift box of
sweets for Diwali. How do I
make it?
Let us see what a box
looks like when it is
opened up fully.
1. Collect some cardboard boxes and open them up carefully. What shapes do you see in the flattened boxes?
I want to make
an envelope for my
Diwali card. This is for
my grandparents.
How nice!
I can show you how to
make it.
2. Make an Envelope. Use a square piece of paper and fold it as shown in the picture.
Teacher’s Note:
Encourage children to open the box and look at the number of faces and notice their shapes. Let children make cylinders and cones with paper, and cubes and cuboids with the nets provided in the book
Baking biscuits
They fit
together in the
box so well.
Yes, because
they are all rectangular
in shape and have the
same size.
Observe
the faces of these
objects. What is common
among them?
I got a square
and a rectangle
after tracing the
wooden box
I got three
different
rectangles after
drawing outlines of
the matchbox.
Let us Do
1. Trace all the faces of any cuboidal object. (example — sharpener or eraser)
(a) How many different faces did you get? __________________
(b) What shapes are these faces? __________________
(c) Did you get a square? __________________
(d) Can you get six different rectangles by tracing a cuboid?
__________________
(e) Can a cuboid have a face like a triangle? __________________
(f) The faces of a cuboid are __________________ or
__________________ in shape.
2. Construct the rectangles using the sides given below:
3. Draw 3 bigger rectangles around this small rectangle.
Teacher’s Note:
Allow children to build a rectangle with 4 sticks. Observe if children have developed an intuitive sense of a rectangle. Introduce the word rectangle. Provide them opportunities to observe and draw rectangles of different sizes and in different orientations on a dot grid.
4. Count and write the number of rectangles in the following picture.
__________________
5. Look at the different rectangles given below and answer the following questions.
(a) How many sides are there in a rectangle? ______________
(b) How many corners are there in a rectangle? ______________
(c) Are there any sides in a rectangle that are equal
in length to each other? ______________
(d) What do you notice in a rectangle? Describe it in your
own words.
Same to Same
My aunt
gifted us a board
game.
Oh! These
tiles are exactly
like squares!
The chess and ludo
boards are also square
in shape.
I wonder what is the
difference between a square
and a rectangle?
But, when I fold them, they
become a rectangle
I found a difference. Look at their sides. In a rectangle all sides do not necessarily have to be equal in length. It is enough to have just the opposite sides be equal in length.
In a square all sides
must be equal in length
1. Both have _________ sides.
2. Both have _________ corners.
How many squares do you see
in this drawing?--------
Teacher’s Note:
Allow children to make a square with 4 sticks. Observe if children have developed an intuitive sense of a square and
right angle.
Let us Do
1. Here is a square. Draw 2 bigger squares around this square.
2. Use matchsticks to make a square so that it has squares on all its sides. How many squares did you get?
3. Complete the squares using the sides given below.
4. Use the square cutouts from the book to do this activity.
How many different shapes can
you make by joining
(a) 2 squares
(b) 3 squares
(c) 4 squares
Show them in a dot grid. Some dot
grids are provided in the back of the
book.
Let us Explore
1. Tick the shapes that are rectangles.
Which figures are not rectangles? Explain why.
2. Can you fold all the corners of a square sheet in such a way that the number of corners remains the same?
3. Make a square on a cardboard sheet and cut along the dotted lines marked on the square as shown to get 4 triangles. Make as many different shapes as possible by joining three triangles together. How many shapes can you make?
Now try with four triangles together.
Square corners
Which tile will fit in the corner of this table?
Will the same tile fit in the corner of the math book?
Are the corners of a square the same?__________________
How do you know?
Pile up some squares over one another and see.
Are the corners of a rectangle the same?
How do you know?
Pile up some rectangles over one another and see.
Are the corners of the square and a rectangle the same?
Name some objects in your class that have only square corners.
Let us decorate
these frames with threads.
The corners of a square
and a rectangle are square
corners
Are the corners of
this shape the same as
that of a square
and a rectangle?
How beautiful!
Let us Do
You can join two paper strips to show different corners.
Use the strips to show a square corner, more than a square corner
and less than a square corner.
Can you use the strip to check whether the corner of your table and the board are square corners?
1. Mark the square corners in these shapes.
2. Connect the dots to make some squares
How many different squares did you get?
Teacher’s Note:
Encourage children to classify shapes with only a square corner, shapes with less than a square corner, and shapes withmore than a square corner. Some shapes will have more than one type of corner. Make such shapes using matchsticks.
3. Look at the picture given below and answer the following.
a. Count and write the number of corners.----------
b. Circle the square corners.
4. Use two matchsticks to make two square corners and then foursquare corners. Draw and show it in the space given below:
I can use two
matchsticks to
make one
square corner
5. Murugan made three squares with 10 matchsticks.
Triangle - Triangle …so many Triangles
What is
common to all
these
things?
They have
triangular
faces.
Describe a Triangle
Triangles have ____________ sides. They have ____________corners.
Let us Do
1. Draw and name some triangular objects that you see around you, in your notebook.
2. Count the number of triangles in the given rangoli.
3. How many different triangles can be made using the dots on this circle?
4. Move two matchsticks to turn the one triangle into two triangles
Teacher’s Note:
Paper folding and cutting to be used to create different
types of triangles. Students should be encouraged to build triangles with sticks and clay
Circus with Circles
Let us Discuss
1. Have you been to a circus?
2. What does a circle look like? How is a circle different from a rectangle?
Let us Do
1. Name some objects that are like circles.
___________________________
2. Draw colourful circles to complete the circus scene.
3. Draw circles by tracing bottle caps, bangles, and rings in your notebook.
Children are playing a game. They have made a
circle on the ground.
Have you played any game where you need
to draw a circle? __________
Try to make a
circle on the playground.
What are
you doing with the
paper plate?
I am
folding the plate
in half.
Open it up.
See. I got a
straight line going
through the circle. I
made it red.
I made other
folds and made
the lines blue.
They are
not as long as
the red line.
Let me fold
another half and see what
happens.
You get two
straight lines
and they meet
at a point
Let us take a paper plate and fold
it in half the same ways as
the children did.
The point where the lines meet is
the center of the circle.
Make some puppets using
circular shapes and play with
them.
Let us Do
1. Look at these two shapes and discuss their similarities
and differences. Tick the appropriate word.
Both the
square and the
triangle have
straight
edges.
a. Their corners are:
same
different
b. Number of sides is:
same
different
2. Choose any pair of shapes. Share the similarities and differences in these shapes with your friends.
4. I made one triangle. Then I made another row of triangles.
How many triangles are there
in the second figure?
_________________
If I make one more row, how many triangles will be there in the third figure?
__________________
5. Here are some rectangles that are torn. How many square pieces have been torn from each shape?
___________________________
Teacher’s Note:
Children can play ‘Find my rectangle game’:
Use dot paper. One child marks 2 opposite vertices of a rectangle on the
dot paper. The second child has to complete the rectangle shape(s).
6. Each of these shapes can be the odd one out
How is each one odd? Discuss.
7. To complete the rectangle, tick the appropriate shapes from the left side to fill the gaps in the shape on the right side.
8. Draw two lines to split the shape into three triangles.
9. Draw one line to split the shape into 3 triangles
10. Make the following shapes with different sizes and orientations(angular positions) in your notebook.
(a) Triangle
(b) Rectangle
(c) Circle
(d) Other shape
Look at the
flower
decoration!
So many lines
and curves!
My grandma’s
sarees have
beautiful line
borders
Try to make your own border designs using both curved and straight lines.
Continue the following line pattern
Tangram
Use the pieces from the
tangram puzzle given in the
end of the book. Can you
create these shapes using
some of the pieces?
