Areas of regular figures
To measure the areas of regular geometrical figures like a rectangle, a triangle, or a circle, we have well-known formulae. Some of these are given in Table.

Formulae to calculate the areas of some geometrical figures

Figure	Area
Rectangle	length*breadth
Triangle	1/2*base*height
Circle	22/7*(radius)2
Parallelogram	base*altitude

Using these formulae, we can calculate the required area. For example, if you are asked to find the area of a rectangular playground whose sides are given as 50 m and 60 m, you can easily calculate the area by finding the product of the two sides of the playground.