Question

Length of the two parallel sides of a trapezium are 8.5 cm and 11.5 cm respectively and its height is 4.2 cm, find its area.

Answer 1

Area of trapezium = $\frac{1}{2}\left(\mathrm{sum}\mathrm{of}\mathrm{parallel}\mathrm{sides}\right)\times \mathrm{height}$
$$\begin{gathered} =\frac{1}{2}\times \left(8.5+11.5\right)\times 4.2 \\ =\frac{1}{2}\times 20\times 4.2 \\ =42{\mathrm{cm}}^2 \end{gathered}$$