Page 1 - LN 8

Subject – Mathematics

Chapter 7 – GEOMETRY

Sub-topic 8 : 2D AND 3D SHAPES

Shapes are of two types –i) 2D-shapes

ii) 3D-shapes

2D-shapes:

 It has 2 dimensions that is length and breadth.
 They are also called as flat shapes.
 Ex- Rectangle, square, triangles etc.

Square- A square has 4 sides and 4 vertices.

Rectangle- A rectangle has 4 sides and 4 vertices.

Triangle- A triangle has 3 sides and 3 vertices.

Circle- A circle has no sides and no vertices.

3D- Shapes:

 It has 3 dimensions that is length, breadth and height.
 They are also known as solid shapes.
 Ex- Cube, cuboid, sphere and cone etc.

Cuboid- A cuboid has 6 faces, 12 edges and 8 vertices.

Cube- A cube has 6 faces,12 edges and 8 vertices.