Find the perimeter of the following shape:

A regular pentagon of side $16 \mathrm{cm}$.

Find the perimeter of the following shape:

A regular hexagon of side $12 \mathrm{cm}$.

Find out which of the following has the largest perimeter.

(a) An equilateral triangle of side $20 \mathrm{cm}$.

(b) A square of side $10 \mathrm{cm}$.

(c) A regular pentagon of side $7 \mathrm{cm}$.

(d) A regular hexagon of side $5 \mathrm{cm}$.

There are $3$ ribbons each of length $240 \mathrm{cm}$. They are used to stitch along sides of three banners as shown below.

Find the length of the side of each banner.

The length and the breadth of $4$ rectangles are given below. Find their perimeters. What do you infer from the answer?

$\left(\mathrm{a}\right)$ Length $=11 \mathrm{cm};$  Breadth $=4 \mathrm{cm}$

$\left(\mathrm{b}\right)$ Length $=8 \mathrm{cm};$ Breadth $=7 \mathrm{cm}$

$\left(\mathrm{c}\right)$ Length $=14 \mathrm{cm};$Breadth $=1 \mathrm{cm}$

$\left(\mathrm{d}\right)$ Length $=10 \mathrm{cm};$ Breadth $=5 \mathrm{cm}$