# Q.11 A piece of strings 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?

(a) Perimeter of square = 30 cm
4 × side = 30
Side = $$\frac{30}{4}$$
Side = 7.5 cm
(b) Perimeter of an equilateral triangle = 30 cm
3 × side = 30
Side = $$\frac{30}{10}$$
Side = 10 cm
(c) Perimeter of a regular hexagon = 30 cm
6 × side = 30
Side = $$\frac{30}{6}$$
Side = 5 cm