Find the perimeter of the following rectangles. Which rectangle has th

1.	Find the perimeter of the following rectangles. Which rectangle has the greatest perimeter?
Answer» (i) On measuring, l = 1.8 cm and b = 1.3 cm and Perimeter = 2 (l + b) = 2 (1.8 + 1.3) = 2 (3.1) = 6.2 cm (ii) On measuring l = 1.5 cm and b = 0.8 cm and Perimeter = 2 (l + b) = 2 (1.5 + 0.8) = 2 (2.3) = 4.6 cm (iii) On measuring l = 2.1 cm and b= 1.6 cm and Perimeter = 2 (l + b) = 2 (2.1 + 1.6) = 2 (3.7) = 7.4 cm (iv) On measuring l = 1.8 cm and b= 1.2 cm and Perimeter = 2 (l + b) = 2 (1.8 + 1.2) = 2 (3) = 6 cm Thus, Perimeter of (iii) figure is greatest.

Find the perimeter of the following rectangles. Which rectangle has the greatest perimeter?

Answer»

(i) On measuring, l = 1.8 cm and b = 1.3 cm and

Perimeter = 2 (l + b)

= 2 (1.8 + 1.3) = 2 (3.1)

= 6.2 cm

(ii) On measuring l = 1.5 cm and b = 0.8 cm and

Perimeter = 2 (l + b)

= 2 (1.5 + 0.8) = 2 (2.3)

= 4.6 cm

(iii) On measuring l = 2.1 cm and b= 1.6 cm and

Perimeter = 2 (l + b)

= 2 (2.1 + 1.6) = 2 (3.7)

= 7.4 cm

(iv) On measuring l = 1.8 cm and b= 1.2 cm and

Perimeter = 2 (l + b)

= 2 (1.8 + 1.2) = 2 (3)

= 6 cm

Thus, Perimeter of (iii) figure is greatest.