Perimeter, Area and Volume

Weâ€Œ â€Œhaveâ€Œ â€Œlearnedâ€Œ â€Œabout geometry shapes – open and closed figures, plane figures and solid shapes, etc., â€Œinâ€Œ â€Œourâ€Œ â€Œpreviousâ€Œ â€Œclass.â€Œ â€Œ

In this chapter, we will be learning about the area, volume, and perimeter of these solid shapes.

What is a Perimeter

The perimeter of a simple or carved figure is the total measure of the length covered, going around the figure once. The measure of the total length around a figure is called its perimeter.

• The perimeter of the rectangle = Length + breadth + length + breadth (or)2 * length + breadth.
• The perimeter of the square = 4 * measure of side (or) the sum of the measures of all four sides.
• The perimeter of a triangle = The sum of the measures of all three sides.

What is Area

The measure of the space occupied by a plane surface is called its area. The area is written in square units.

• The area of a square = sideÃ—side (square units)
• The area of a rectangle = length Ã— breadth (square units)

What is Volume

The space occupied or covered by any solid is called its volume. The unit of volume is cubic centimetre, cubic metre etc.

• Volume of a cube = side * side * side

A cube is an object whose length, breadth and height are equal

• Volume of a cuboid = length * breadth * height

A cuboid is an object whose length, breadth and height are not equal.

Stay tuned to BYJU’S for more information on NIOS, syllabus, notes, along with its important questions and solutions.