Lesson 7, Topic 2
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# Types and Area of Plane Figures

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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 so as to buy an adequate amount of paint.

Plane FigureArea

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

$$\frac{1}{2} \: \scriptsize(a \: + \: b)h$$

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