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    				| 1. | Find the approximate area of an irregular lamina of which boundary line is drawn on the graph paper shown in fig. 1.16. below. | 
| Answer» From figure, the number of complete squares = 11 The number of squares more than half = 9 ∴ Total number of squares = 11 + 9 = 20 ∴ Area of the 1 square = 1 cm × 1cm = 1 cm2 ∴ Area of 20 squares = 20 × 1 cm2 = 20 cm2 ∴ Approximate area of irregular lamina = 20 cm2 | |