Page 112 - Maths Skill - 3

110 Maths

6. Fold the given figures on corners and find the required new—

(a) (b) (c)

____ square corners ____ square corners ____ square corners
____ less than square corner ____ less than square corner ____ less than square corner
____ more than square corner ____ more than square corner ____ more than square corner
____ number of triangles ____ number of triangles ____ number of triangles

7. In the given figures. Count the number of circles,

number of square corners, number of less than square
corners and number of triangles also.

Solid Shapes

Solid shapes have length, width and height. They
are also called three-dimensional or 3D shapes.
For example, ball, book, dice, etc.

Solids have different types of surfaces.
Fact-o-meter
Flat surface
The outer part of a solid

Curved surface which we usually see
and touch is called the
surface of the solid.

Faces, Edges and Vertices

� The surface of a solid shape is called its face. Vertex
� An edge is formed where two faces meet. Edge

� A vertex is a point where two or more edges meet.
Face
Types of Solid Shapes
Cuboid, cube, cylinder, cone and sphere are some common solid shapes. These solids
have different number of faces and edges. Faces and edges both can be flat or curved.

Cube Vertex

A cube has 6 faces. All faces of a cube are flat and equal.
It has 8 vertices and 12 edges. Edge

In a cube, every face is a square.
Face