Page 116 - ICSE Math 4

Oval

An oval is a plane closed fi gure that has no sides or edges and corners or

ver ces. It is like a fl a ened circle which resembles the shape of an egg or
an ellipse.

Solid Shapes

Solids are the objects that have a defi nite shape and occupy space. They are also known
as three-dimensional (3D) fi gures. Let’s study some proper es related to solids.

• The face of a solid is its surface.
• The edge of a solid is the side where two faces meet.

• The vertex of a solid is the point where three edges meet.

Some common solids that we see in our daily life are described here.
Cube
Vertex
Cube is a solid made up of 6 fl at square-shaped
faces or 6 equal square sides.
It consists of 12 straight edges and 8 ver ces. Edge
Face
Dice, sugar cube and Rubik’s cube are some examples of cube. Cube

Cuboid

Cuboid is a solid made up of 6 flat faces.

Four of them are always rectangular and Vertex
the other two may be rectangular or
square in shape.
It consists of 12 straight edges and Edge
8 ver ces. Face Cuboid

Matchbox and brick are some examples of cuboid.

Sphere
Curved face/
Sphere is a solid with only 1 curved surface. Surface

It has no edge or vertex.

Football and globe are some examples of sphere. Sphere
Cylinder Flat Edge

surface
Cylinder is a solid with 2 flat and 1 curved surface.

It has 2 curved edges but does not have any vertex.
Curved
Gas cylinder, candle, rolling pin and tubelight are surface
some examples of cylinder. Cylinder

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