Tamil Nadu Board Solutions for Chapter: Perimeter And Area, Exercise 3: Solved Example

Thendral, Tharani and Thanam are given a thread piece each of length $12 \mathrm{cm}$. They are asked to make a rectangle, a square and a triangle respectively with the thread for their Math activity. In how many ways, can they make the respective shapes?

Find the cost of fencing a square plot of side $12 \mathrm{m}$ at the rate of $₹ 15$ per metre.

Find the area of a rectangle of length $12 \mathrm{cm}$ and breadth $7 \mathrm{cm}$.

Find the area of a square of side $15 \mathrm{cm}$.

Find the area of a right angled triangle whose base is $18 \mathrm{cm}$ and height is $12 \mathrm{cm}$.

Find the perimeter of the given figure.

Find the perimeter and the area of the following '$L$' shaped figure.

Four identical square floor mats of side $15 \mathrm{cm}$ are joined together to form either a rectangular mat or a square mat. Which mat will have a larger area and a longer perimeter?