Types and Area of Plane Figures

The term ‘area‘ refers to the amount of space inside the boundaries of a figure. We frequently use areas in our daily life. For example, if you want to paint the walls of your room, you have to know the area to be painted to buy an adequate amount of paint.

Below is a table showing plane shapes and the formulas used to calculate their areas:

Plane Figure	Area
Triangle	\( \frac{1}{2} \scriptsize \: \times \: Base \: \times \: Height \)
Square	\( \scriptsize L \: \times \: L \)
Parallelogram	Base x Height (b x h)
Trapezium	\( \frac{1}{2} \: \scriptsize(a \: + \: b)h \) ½ sum of parallel sides × height
Circle	\( \frac{22}{7} \) x radius x radius or \( \scriptsize \pi r^2 \)
Trapezoid	\( \frac{1}{2} \: \scriptsize(a \: + \: b)h \)