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1.2

Minor Versionm

by Suhail Ahanger

Introduction

A simple, effective and enjoyable way to measure the area of irregular shapes, such as leaves, by tracing out the shape and using graph paper.

Tools

Parts

    • Wash hands after handling the leaves as it may contain dirt

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  1. Lay the leaf on the graph sheet.
    • Lay the leaf on the graph sheet.

    • Trace its outline using Pen/Pencil.

    • No need to trace the area of Stem (Petiole).

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    • Use two different colors to mark full squares and partial ones

    • Use Pen/Pencil and number the full squares inside the leaf trace.

    • Use an alternative color to number the partial squares inside the leaf trace.

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    • Multiply the number of full squares by 1 cm2 and partial squares by 0.5 cm2 and add them together.

    • Repeat the above steps for any number of leaves.

    • Multiplying partial squares by 0.5 cm2 is not accurate. But, since the errors average out, you get a good estimate of the leaf's area.

    Vishal:

    (1) Reduce the text in the steps. You may replace the first 5 steps by: "Multiply number of full squares by 1 cm2 and partial squares by 0,5 cm2 and add them together...."

    (2) You may want to mention that multiplying partial squares by 0.5 cm2 is not accurate but, since the errors average out you get a good estimate of the leaf's area.

    Procheta Mallik - Reply

    • Try the same on 2 , 4 cm2 graph sheets and compare the results to arrive at the most accurate value.

    Vishal: Not sure if you will get more accurate results by doing it on bigger squares graph. It's a good variant though.

    Procheta Mallik - Reply

    • Leaf is moved when profiling.

    • Miscounted the number of "Full" and "Partial" squares.

    • Margin of error when approximating the partial squares as 'Half'.

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Finish Line

Kailash NR

Member since: 05/02/2017

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71 Guides authored

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