Question

Find the area of the equilateral triangle whose each side is (a)12 cm (b)5cm

Answer 1

dear student

$$\begin{gathered} areaofequilateraltriangle=\frac{\sqrt{3}}{4}\times (side{)}^2 \\ forside=12cm \\ areaofequilateraltriangle=\frac{\sqrt{3}}{4}\times (side{)}^2=\frac{\sqrt{3}}{4}\times 144=36\sqrt{3} \\ forside=5cm \\ areaofequilateraltriangle=\frac{\sqrt{3}}{4}\times (side{)}^2=\frac{\sqrt{3}}{4}\times 25=\frac{25\sqrt{3}}{4} \end{gathered}$$