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Class: V Sub: Maths Chapter: Boxes and Sketches
2D Shapes:
Shapes having length and breadth only are called two
dimensional(2D) shapes.
Eg: Square, Rectangle, Triangle, Circle
3D Shapes:
Shapes having length, breadth and height are called three
dimensional(3D) shapes.
Eg: Cube, Cuboid, Cone, Sphere
NCERT TEXT BOOK Pg.No:126
Sweet box
Make your own sweet box and paste in your notebook.
Hint: Use the cut-out on page no:201. Fold the cut-out along its dotted
lines and make a sweet box.
Find out which of these can be made into a box:
Ans: a and c
CUBE
*A cube is a 3Dimensional (3D) shape.
*A cube is made by 6 squares. i,e, it has 6 faces.
*All the sides of a cube are equal in measurements.
*A cube has 8 corners.
*A cube has 12 edges.
NCERT TEXT BOOK Pg.No:127
Shapes that fold into a cube
Draw different shapes on a square grid paper(1cm) so that, it can be
folded into cubes.
*Area of each design is 6 squarecm. It is clearly known that. Cube has
6 faces.
*All the designs drawn above can be folded into cubes.
*Area of each face of the cube = side x side
Draw one shape which will not fold into a cube?
Look around and discuss which things around you look like a cube.
Ans: chalk box, dice, ice cube
NCERT TEXT BOOK Pg.No:128
Shapes for an open box:
OPENBOX
Q.1.Find out which of the other shapes (on page no:40) can be folded
to make an open box. (Draw it using square grid paper)
Q.2. Draw more shapes which will not fold to make an open box.
Boxes and boxes:
All boxes are not cubes. Here are some different kinds of boxes.
Match each shape with a box into which it fold.
NCERT TEXT BOOK Pg.No:129
Floor maps
The 2Dimensional representation of the map of a house is
called floor map.
For making a house floor map is first made.
It shows where the windows and doors are in the house.
The side which contains the door is front side. There are two
windows on the front side.
Note: From the floor map, we cannot make out a house really looks
like or how high the windows are.
Deep Drawings:
The special way of drawing the house which is deep to show
its length, width and height is called a deep drawing of a house.
Deep drawing of a house is a 3D representation of the map of a
house.
Here are four deep drawings of a house are given.
c) d)
Which one is the correct deep drawing of the above given floor map.
Ans: ‘d’
Why do the other three deep drawings not match with the floor map.
Ans: (a) the back wall is not staight in the floor map.
(b) a window is drawn on the extreme side wall.
(c) the window is drawn in side wall is in middle, but in
actual figure(floor map), it is near to the corner.
NCERT TEXT BOOK Pg.No:130
Practice time
Q.1.look at this floor map of a house. Make doors and windows on
the deep drawing of this house.
*Are there any windows you could not show on the deep drawing?
Circle them on the floor map.
Ans: yes, 2 windows
A Deep drawing of a cube
*Which of the drawings look correct to you?
Ans: Drawings ‘d’ and ‘e’ are correct
*Can you add some lines to make drawing ‘f ’ into a deep drawing of
the cube?
Ans:
NCERT TEXT BOOK Pg.No:131
Puzzle
Which of these is a correct deep drawing of that cube?
Ans: (a) , (d) and (e)
A simple way to draw a cube
Deep drawing of a cuboid
*A cuboid is a 3Dimensional (3D) shape.
*A cuboid has 6 faces.
*A cuboid has length, width and height of different measurements.
*A cuboid has 8 corners. *A cuboid has 12 edges.
Draw the top, front, side view of the following objects
Objects From the top From the front From the side
CAR
TABLE
MATH
MAGIC
Text
book
Class:5
NCERT TEXT BOOK Pg.No:132
Matchbox play
Top view
Side view
Front view
*Look at the photo and try to make a deep drawing of this bridge
NCERT TEXT BOOK Pg.No:133
Practise time
Make drawings to show how this bridge looks like
*From the front *From the top *From the side
2) Make a matchbox model which look like this.
From the top From the front From the side
Hint: Using match boxes, make a model which shows its top, front,
side as mentioned above.
*Also make a deep drawing of a model in your notebook.
3)How many cubes are needed to make this interesting model?
Ans: 95
Hint: 5 cubes in 9 columns ,5 x 9 = 45
4 cubes in 7 columns, 4 x 7 = 28
3 cubes in 5 columns, 3 x 5 = 15
2 cubes in 3 columns, 2 x 3 = 6
1 cube in 1 column, 1 x 1 = 1
Total no of cubes = 95
*Mark the correct top view drawing with ‘T’ and the correct side
view drawing with ‘S’of the given interesting model .
TS
Ans: (a)Top view drawing , (b)Side view drawing