# Measurement of irregular plane surface in Learning how to measure – Class 6 Science Experiment

**Chapter Name: Learning how to measure**

**Activity Name:** **Measurement of irregular plane surface in Learning how to measure**

**Activity Description: **

In this experiment, we will measure the area of an irregular plane surface, such as a banana peel or a leaf, using graph paper. By counting the squares on the graph paper, we can estimate the area of the irregular shape.

**Required Items:**

- Graph paper with small, uniformly-sized squares (preferably 1 cm x 1 cm)
- A leaf or a banana peel with an irregular shape
- Pencil

**Step by Step Procedure:**

- Place the leaf or banana peel on the graph paper.
- Use a pencil to trace the outline or boundary of the leaf on the graph paper. Ensure that you mark the boundary accurately.
- Remove the leaf or banana peel, and you will have the outline or boundary of the shape drawn on the graph paper.
- Count the number of complete squares (each measuring 1 cm²) that are completely enclosed within the boundary of the shape. These squares represent the whole units of area.
- Additionally, count the squares that are half or greater than half enclosed within the boundary. Include these squares in your count.
- Add the number of complete squares and the number of half or greater than half squares together. This sum represents the total number of squares inside the boundary.
- The total number of squares inside the boundary corresponds to the approximate area of the leaf or banana peel in square centimeters (cm²).
- Exclude any squares inside the boundary that are less than half enclosed. Neglecting these squares helps provide a value of the area that is close to the actual area.

**Experiment Observations:**

- Number of complete squares inside the boundary.
- Number of squares half or greater than half enclosed within the boundary.
- Total number of squares inside the boundary.

**Precautions:**

- Handle the leaf or banana peel carefully to avoid damaging or tearing it.
- Ensure that the leaf or peel is placed flat on the graph paper to get an accurate outline.
- Use a sharp pencil to trace the outline accurately.
- Count the squares carefully to avoid errors in the final measurement.

**Lesson Learnt from Experiment: **

Using graph paper to measure the area of irregular plane surfaces helps break down the shape into discrete units, allowing for a more accurate estimation of the area.

By counting the squares and considering the half or greater than half squares, we can obtain a value close to the actual area. This method demonstrates the importance of using appropriate tools and techniques to measure irregular shapes effectively.