Area of squares and rectangles
Key Notes :
Definition of Area: Area is the measure of the amount of space a shape covers. For squares and rectangles, it is measured in square units, such as square centimeters (cm²) or square meters (m²).
Formulas:
- Square: Area = side length × side length (or Area = side²)
- Rectangle: Area = length × width
Calculation:
- For a Square: Measure the length of one side and multiply it by itself to find the area.
- For a Rectangle : Measure the length and width, then multiply these measurements together to find the area.
Learn with an example
▶️ What is the area?
______ square kilometres
Find the base and height of the rectangle.
base: 11 km
height: 22 km
Use these numbers in the formula.
Area = base × height
= 11 × 22
= 242
Now find the units. The lengths are measured in kilometres, so the area is measured in square kilometres.
The area is 242 square kilometres.
▶️ What is the area?
____ square kilometres
Find the base and height of the rectangle.
base: 14 km
height: 12 km
Use these numbers in the formula.
Area = base × height
= 14 × 12
= 168
Now find the units. The lengths are measured in kilometres, so the area is measured in square kilometres.
The area is 168 square kilometres.
▶️ What is the area?
_____ square metres
Find the base and height of the rectangle.
base: 18 m
height: 11 m
Use these numbers in the formula.
Area = base × height
= 18 × 11
= 198
Now find the units. The lengths are measured in metres, so the area is measured in square metres.
The area is 198 square metres.
Let’s practice!🖊️
