Answer in detail I — task. Science State Board, Class 7.

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Describe the graphical method to find the area of an irregularly shaped plane figure.

Answer variants:

Pick a leaf from a tree

Outline of the leaf using a pencil

Remove the leaf and notice the outline

Place a leaf on a graph sheet

'Graphical method' is a method that can be used to determine the of an irregular object. This method requires a leaf, a and a pencil.

Procedure:

STEP 1:

STEP 2:

STEP 3:

STEP 4:

Calculation:

1. First, count the that are contained within the leaf's outline. Note it as \(A\).

2. Then, count the squares that are , assume it as \(B\).

3. Now, count the squares that are of a whole square. Take it as \(C\).

4. Finally, count the squares that are of the full square. Take it as \(D\).

Formula:

Area of the leaf = A + (\frac{i}{i}) B + (\frac{i}{i}) C + (\frac{i}{i}) D {cm}^{2}

Graphical method is also used to find the area of the . This method gives us an , especially for square and rectangle.

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20. Answer in detail I