# Measuring the area of a regular surface in Learning how to measure – Class 6 Science Experiment

## Activity Name: Measuring the area of a regular surfacein Learning how to measure

### Activity Description:

The experiment involves measuring the area of a regular surface, specifically a rectangle. A cardboard with dimensions 4 cm by 2 cm is cut into the shape of a rectangle.

The area of the cardboard will be measured using a centimetre graph paper, where each small square has a side length of 1 cm.

### Required Items:

1. Cardboard
2. Centimetre graph paper
3. Sharp pencil

### Step by Step Procedure:

1. Cut a cardboard into a rectangle shape with a length of 4 cm and a breadth of 2 cm.
2. Take a centimetre graph paper, where each small square has a side length of 1 cm.
3. Place the cardboard on the centimetre graph paper and outline its shape using a sharp pencil.
4. Remove the cardboard and mark the outlined shape as PQRS.
5. Count the number of squares inside the outline. In this case, the number of squares is 8.
6. The area of the cardboard is equal to the area covered by PQRS on the graph paper.
7. Calculate the area of PQRS by multiplying the number of squares (8) by the area of 1 unit square (1 cm^2). Area of PQRS = 8 × 1 cm^2 = 8 cm^2

### Experiment Observations:

• The cardboard was cut into a rectangle shape with dimensions 4 cm by 2 cm.
• The outlined shape PQRS on the graph paper contained 8 small squares.
• The area of the cardboard, measured as the area covered by PQRS, was found to be 8 cm^2.

### Precautions:

1. Handle the sharp pencil carefully to avoid any accidents.
2. Ensure the cardboard is accurately cut into the specified dimensions.
3. Place the cardboard carefully on the graph paper to accurately outline its shape.

### Lesson Learnt from Experiment:

The measured area of the cardboard (8 cm^2) can be related to the formula for finding the area of a rectangle. In general, the area of a rectangle is calculated by multiplying its length by its breadth or width.

In this experiment, the length of the rectangle was 4 cm and the breadth was 2 cm, which gives an area of 8 cm^2. Therefore, the formula for finding the area of a rectangle (length × breadth) can be applied to determine the measured area in this experiment.