The lawn in front of Molly’s house is 12m × 8m, whereas the lawn in front of Dolly’s house is 15m × 5m. A bamboo fencing is built around both the lawns. How much fencing is required for both?

Avneet buys 9 square paving slabs, each with a side of m. He lays them in the form of a square.

(a) What is the perimeter of his arrangement [Fig. (i)]?

(b) Shari does not like his arrangement. She gets him to lay them out like a cross. What is the perimeter of her arrangement [Fig. (ii)]?

(c) Which has greater perimeter?

(d) Avneet wonders if there is a way of getting an even greater perimeter. Can you find a way of doing this? (The paving slabs must meet along complete edges, i.e., they cannot be broken)

What is the perimeter of each of the following figures? What do you infer from the answers?

A piece of string is 30 cm long. What will be the length of each side, if the string is used to form:

(a) A square?

(b) An equilateral triangle?

(c) A regular hexagon?

The perimeter of a regular pentagon is 100 cm. How long is its each side?

Find the cost of fencing a square park of side 250 m at the rate of Rs. 20 per metre.

Find the side of the square whose perimeter is 20 m.

Find the perimeter of a regular hexagon with each side measuring 8 m.

Find the perimeter of each of the following shapes:

(a) A triangle of sides 3 cm, 4 cm and 5 cm.

(b) An equilateral triangle of side 9 cm.

(c) An isosceles triangle with equal sides 8 cm and third side 6 cm.

What is the length of the wooden strip required to frame a photograph of length and breadth 32 cm and 21 cm respectively?

Find the perimeter of a triangle with sides measuring 10 cm, 14 cm and 15 cm.