Page 117 - ICSE Math 4

Cone

Cone is a solid made up of 1 flat and 1 curved surface.

It has 1 curved edge and 1 vertex. Vertex
Curved
Birthday cap and ice cream cone are examples of cone.
Curved edge
In the above men oned solids, some have flat surfaces, surface
some have curved surfaces and some have flat as well
Flat
as curved surfaces.
surface
• Cubes and cuboids have flat surfaces. Cone

• Sphere has curved surface.
• Cylinders and cones have flat as well as curved surfaces.

Exercise 9.4

1. Give an example for each of the following shapes that we see in our daily life.

(a) Oval (b) Sphere (c) Cylinder (d) Circle (e) Square
(f) Cube (g) Cone (h) Cuboid (i) Rectangle (j) Triangle

2. Write the shapes of the following objects.

(a) (b) (c) (d) (e)

3. Fill in the blanks.

(a) __________ are the objects that have shape and occupy space.

(b) A triangle has __________ sides and __________ ver ces.

(c) The __________ of a solid is the side where two faces meet.

(d) A sphere is a solid made up of __________ curved surface and it does not have
any __________.

(e) Cylinders and cones have __________ as well as __________ surfaces.

(f) The __________ of a solid is the surface of that solid.

Circle

We know that a circle is a simple closed fi gure that has no sides or ver ces and is formed
by curved lines. Bangle, tyre, pizza and coin are examples of circular things that we see in
our daily life. But a circle has many parts. Let’s learn more about them by doing an ac vity.

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