Hi, students! Welcome back to Primary 4 Mathematics. In our previous lesson, we learned about No previous lesson found.. Today, we’re going to learn about Area.
Objectives
By the end of this lesson, you should be able to:
- Define area and understand its importance.
- Identify and use appropriate units of measurement for area.
- Calculate the area of rectangles and squares using formulas.
- Solve word problems involving areas of rectangles and squares.
- Solve quantitative aptitude problems related to area.
Area
What is Area?
Area is the amount of space a two-dimensional shape covers. It tells us how much surface a shape takes up. We measure area in square units, like square centimeters (cm²), square meters (m²), and square kilometers (km²). Imagine you’re painting a wall; the area tells you how much paint you’ll need to cover the entire surface.
Units of Measurement of Area
There are different units of measurement for area, depending on the size of the surface:
- Square Centimeters (cm²): Used for small surfaces like a piece of paper or a book cover.
- Square Meters (m²): Used for larger surfaces like a room or a playground.
- Square Kilometers (km²): Used for very large areas like a city or a country.
Calculating Area of Rectangles
To find the area of a rectangle, we multiply its length by its breadth:
Area = Length × Breadth
For example, if a rectangle has a length of 5cm and a breadth of 4cm, its area would be:
Area = 5cm × 4cm = 20cm²
Calculating Area of Squares
A square is a special type of rectangle where all sides are equal. To find the area of a square, we multiply the length of one side by itself:
Area = Side × Side
For example, if a square has sides of length 7cm, its area would be:
Area = 7cm × 7cm = 49cm²
Evaluation Questions
Now that you’ve learned about area, let’s see if you can answer these questions:
- What is area, and why is it important?
- What unit of measurement would you use to measure the area of a classroom floor?
- Calculate the area of a rectangle with a length of 10cm and a breadth of 6cm.
- Calculate the area of a square with sides of length 8cm.
- A rectangular garden has a length of 12m and a breadth of 8m. Calculate its area.
Conclusion
We’ve learned about area, its units of measurement, and how to calculate the area of rectangles and squares. Remember, area is a crucial concept in many real-life applications, from planning space to calculating materials. Keep practicing, and you’ll become an expert in area calculations! Don’t forget to check the comments section if you have any questions, and use the navigation to move to the next lesson. See you in the next lesson!
