Find the approximate area of an irregular lamina of which boundary line is drawn on the graph paper shown in the figure:

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Solution

To calculate the area of the irregular lamina approximately, let us look at the squares enclosed by the boundary.

Let us count the fully enclosed squares first and mark them as , I = 11.

Count the squares that are enclosed more than half and mark them as x, x = 10.

Area = I + x = 11 + 10 = 21 cm²

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Find the approximate area of an irregular lamina of which boundary line is drawn on the graph paper shown in the figure:

To calculate the area of the irregular lamina approximately, let us look at the squares enclosed by the boundary. Let us count the fully enclosed squares first and mark them as , I = 11. Count the squares that are enclosed more than half and mark them as x, x = 10. Area = I + x = 11 + 10 = 21 cm2