Introduction to Perimeter and Area

Two sides of a triangle are $25 \mathrm{cm}$ and $40 \mathrm{cm}$ and the perimeter is $85 \mathrm{cm}$. If the length of the third side is $x \mathrm{cm}$, find the value of $x.$ 

Minti has a lovely house. She wants to know the area of her house. The plot where Minti's house is built is $19 \mathrm{m}\times 11 \mathrm{m}$. Observe the floor plan of Minti's house and find the perimeter of Minits's house.

Hint: $1$ block  $= 1 {\mathrm{m}}^2$

$\frac{1}{2}$ block $=\frac{1}{2} {\mathrm{m}}^2=0.5 {\mathrm{m}}^2$

In the figure, the measurements of four sides are given. If its perimeter is $24 \mathrm{cm}$, then what is the length of the fourth side (in $\mathrm{cm}$)?

How can we measure the perimeter of this field?

Find out the perimeter of the following regular shape with the help of formula, if the perimeter is in 'k' cm, then find the value of k.

Find out the perimeter of the following regular shape with the help of formula, if the perimeter is in 'k' $\mathrm{cm}$, then find the value of k.

Find out the perimeter of the following regular shape with the help of formula, if the perimeter is in 'k' $\mathrm{cm}$, then find the value of k.

Find out the perimeter of the following regular shape with the help of formula, if the perimeter is in 'k' $\mathrm{cm}$, then find the value of k.

Find out the perimeter of given shape, if the perimeter is in 'k' $\mathrm{cm}$, then find the value of k.

Find out the perimeter of the given shape, if the perimeter is in 'k' $\mathrm{cm}$, then find the value of k.

If the perimeter of figure formed by joining two regular pentagons of same size is $56 \mathrm{cm}$ and the length of each side is $k \mathrm{cm}$, then find the value of $k$.