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1. Observe the adjoining figure and answer the following questions: D C
(a) Which edge is the intersection of faces ADHE and HEFG? A B
(b) Which two faces meet at edge EF? h
l
(c) Write the name of all the faces from the vertex A. H G b
2. Draw a net of cuboid of dimensions 4 cm × 3 cm × 2 cm.
E F
3. Draw an isometric sketch of a cube of side 4 cm.

Introduction

In the previous chapter, we have learnt the following:
• A figure which has only two dimensions, i.e., length and breadth is
known as a two-dimensional or a 2-D figure. For example, a rectangle,
a quadrilateral, a circle etc. A rectangle (2-D figure)
• A figure which has only three dimensions, i.e., length, breadth, and
height is called a three-dimensional or a 3-D figure. For example, a
cuboid, a cube, a cone, etc. 3-D shapes are also called as solid shapes.
In this chapter, we shall discuss about various types of three-dimensional
figures and understand how to visualise them.

Views of 3-D Shapes A cuboid (3-D figure)

We know that a 3-D object, when viewed from different positions, we get
different looks for it. This is called visualising a solid shape.
For example, on looking at this cuboid (given alongside) from different angles,
we get the following views:

This means that when the same object is viewed from different angles or different positions, it
may look different. Let us look a few more examples of various objects when viewed from different
angles. A hut when viewed from the different angles.

Maths Talk
Look at different objects
in your surroundings
and try to draw their
Now observe the different views of a juice can. views when looked from
Top different angles. Discuss
with your friends, parents
Front Side or siblings.

A juice can Front view Side view Top view

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