Question

The perimeter of an equilateral triangle is 16.5 cm. Find the length of its side.

Answer 1

$$\begin{gathered} \mathrm{Given}:\mathrm{Perimeter}\mathrm{of}\mathrm{the}\mathrm{equilateral}\mathrm{traingle}=16.5\mathrm{cm} \\ \mathrm{Let}\mathrm{the}\mathrm{side}\mathrm{of}\mathrm{the}\mathrm{triangle}\mathrm{be}a\mathrm{cm}. \\ \mathrm{Then},\mathrm{perimeter}=3a \\ \mathrm{Now},3a=16.5 \\ \Rightarrow a=\frac{16.5}{3}=5.5\mathrm{cm} \\ \mathrm{Thus},\mathrm{the}\mathrm{length}\mathrm{of}\mathrm{the}\mathrm{side}\mathrm{is}5.5\mathrm{cm}. \end{gathered}$$