Question

Find the perimeter of a rectangle whose sides are:

a. 12cm and 9cm​

Answer 1

Answer:

Perimeter of the given rectangle = 42 cm

Step-by-step explanation:

Rectangle is a 2 dimensional shape in which each angle measures 90° and opposite sides are equal.

Given:

• Length = 12 cm
• Breadth = 9 cm

To find:

Perimeter of rectangle = ?

Solution:

Perimeter of a rectangle = 2 (Length + Breadth)

→ Perimeter of rectangle = 2 (12 + 9)

→ Perimeter of rectangle = 2 (21)

→ Perimeter of rectangle = 42 cm

∴ Perimeter of rectangle = 42 cm

KNOW MORE:

• The unit for perimeter is just metre (m)
• But, the SI unit of area = m²
• Area of rectangle = Length × Breadth