Solved example

Find the perimeter (in $\mathrm{cm}$)of the following: An equilateral triangle of side $12 \mathrm{cm}$

Find the perimeter (in $\mathrm{cm}$)of the following: A rhombus of side $10 \mathrm{cm}$

Find the perimeter (in $\mathrm{cm}$)of the following: An isosceles triangle in which equal sides measure $10 \mathrm{cm}$ and its base measure $8 \mathrm{cm}$. 

Find the perimeter (in $\mathrm{cm}$)of the following: A parallelogram whose adjacent sides measure $8 \mathrm{cm}$ and $12 \mathrm{cm}$

The perimeter of a square and rectangle are equal. The side of the square is $15 \mathrm{cm}$ and the length of the rectangle is $18 \mathrm{cm}$. Find the breadth (in $\mathrm{cm}$) of the rectangle.

The perimeter of a square is equal to the perimeter of a rectangle of dimensions $15 \mathrm{cm}\times 13 \mathrm{cm}$. Find which one has the larger area.

A door of length $2 \mathrm{m}$ and breadth $1.5 \mathrm{m}$ is fitted in a wall. The length and breadth of the wall are $6 \mathrm{m}$ and $3.5 \mathrm{m}$ respectively. Find the cost(in $₹$)of white washing the wall at the rate of $₹25$ per $\mathrm{sq}. \mathrm{m}.$