Question

Find the perimeter of :

(i) an equilateral triangle of side 9.8 cm.

(ii) an isosceles triangle with each equal side = 13 cm and the third side = 10 cm.

(iii) a regular pentagon of side 8.2 cm.

(iv) a regular hexagon of side 6.5 cm.

Answer 1

(i) The perimeter of equilateral triangle = 3 x side

= 3 x 9.8 cm

= 29.4 cm

(ii) Required perimeter = 13 cm + 13 cm + 10 cm

= 36 cm

(iii) Perimeter of given pentagon = 5 x side = 5 x 8.2 cm

= 41 cm

(iv) Perimeter of given hexagon = 6 x side = 6 x 6.5 cm

= 39 cm