Grade 9 O
Mensuration
Introduction
Square
Rectangle
Trapezium
Summary
Quiz
Video
Group Members
Area of a Rectangle
To find the area of a rectangle multiply the length and the width of the rectangle.:
Formula - Length x Breadth
Eg: Find the area of a rectangle when the length is 4 cm and width is 3 cm.
Formula - Length x Breadth = 4 cm x 3 cm = 12 sq.cm.
Perimeter of Rectangle
To find the perimeter of a rectangle add all the sides
Formula - l + b + l + b = 2 (l) + 2 (b) = 2 (l + b)
Eg: Find the perimeter of a rectangle if the length is 12 cm and breadth is 10 cm.
Formula - 2 (l + b) = 2 (12 + 10) = 22cm.