Question

Find the perimeter of
(i) a regular pentagon of side 8 cm,
(ii) a regular octagon of side 4.5 cm,
(iii) a regular decagon of side 3.6 cm,

Answer 1

(i) Length of each side of the given pentagon = 8 cm
$\therefore$ Perimeter of the pentagon = (5$\times$8) cm
= 40 cm

(ii) Length of each side of the given octagon = 4.5 cm
$\therefore$ Perimeter of the octagon = (8$\times$4.5) cm
= 36 cm

(iii) Length of each side of the given decagon = 3.6 cm
$\therefore$ Perimeter of the decagon = (10$\times$3.6) cm
= 36 cm