Some shapes are given below on grid paper. Find the area of these.

1.	Some shapes are given below on grid paper. Find the area of these.
Answer» (i) Shape is a picture of rectangle. If each side of square is of 1 cm on grid paper then length of rectangle is = 5 cm and width = 2 cm. Number of squares covered by rectangle ABCD = 10 Therefore, area of rectangle ABCD = 10 square cm. Here, there is a rule been between length, width and area of rectangle Length × Width = Area = 5 cm. × 2 cm. = 10 square cm. (ii) Length of square = 4 cm. Width of square = 4 cm. Area of square = (side)² = (4)² = 16 square cm. Number of squares covered by square = 16. Therefore area of square = 16 square cm. (iii) Length of rectangle = 7 cm. Width of rectangle = 3 cm. Area of rectangle = Length × Width = 7 × 3 = 21 square cm. Number of squares covered by rectangle ABCD = 21. Therefore area = 21 square cm.

Answer»

(i) Shape is a picture of rectangle.

If each side of square is of 1 cm on grid paper then
length of rectangle is = 5 cm
and width = 2 cm.

Number of squares covered by rectangle ABCD = 10

Therefore, area of rectangle ABCD = 10 square cm.

Here, there is a rule been between length, width and area of rectangle

Length × Width = Area

= 5 cm. × 2 cm.

= 10 square cm.

(ii) Length of square = 4 cm.

Width of square = 4 cm.

Area of square = (side)² = (4)² = 16 square cm.

Number of squares covered by square = 16.

Therefore area of square = 16 square cm.

(iii) Length of rectangle = 7 cm.

Width of rectangle = 3 cm.

Area of rectangle = Length × Width = 7 × 3 = 21 square cm.

Number of squares covered by rectangle ABCD = 21.

Therefore area = 21 square cm.

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