RBSE Class 6 Maths Notes Chapter 10 Mensuration

These comprehensive RBSE Class 6 Maths Notes Chapter 10 Mensuration will give a brief overview of all the concepts.

RBSE Class 6 Maths Chapter 10 Notes Mensuration

→ Perimeter is the distance covered along the boundary forming a closed figure we go round the figure once. In other words, the sum of lengths of all sides of a plane figure or the length of its boundary is called the perimeter of the figure.

→ Perimeter of a rectangle = 2 × (length + breadth).

→ Perimeter of a square = 4 × length of side.

→ Perimeter of an equilateral triangle = 3 × length of a side.

→ Perimeter of a regular polygon = Number of sides × length of one side.

→ A figure whose all sides and all angles are equal are called closed regular figures.

→ The amount of the surface enclosed by a closed figure is called its area.

→ To calculate the area of a figure using a squared paper, the following steps are adopted:

• The area of one full square is taken as 1 sq. unit. If it is a centimetre square sheet, then area of one full square will be sq. cm.
• Ignore portions of the area that are less than half a square.
• If more than half a square is in a region, count it as one square.
• If exactly half the square is counted, take its area as 1/2 sq. units.

→ Area of a rectangle = Length × breadth.

→ Area of a square = Side × side.