Length..

Week: 8th

Class: Primary 3

Topic: Length

Objectives: At the end of the lesson Pupils should be able to:

1. Find perimeters of regular figures in meters and centimetres by measurement.

2. Identify the perimeter of regular shapes in their environment.

Reference Material: Textbook, charts and pictures

Content:

Length

Calculating the perimeter of plane shapes

A perimeter is the total distance around a shape. The total distance covered by an object is referred to as the perimeter.

The formula for the perimeter is 2(L+B)

L: Length and B: Breadth

Examples

Calculate the perimeter of the following :

1. Length 4cm and breadth 7cm

2. Length 6cm and breadth 4cm

Solutions

1. 2( L+B)

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