Question

the side of an Equilateral triangle is 18cm then
find its (1) Height
(ii)perimeter
(ii) Area
​

Answer 1

Step-by-step explanation:

Height

$\frac{ \sqrt{3} }{2} \times 18 \\ = 9 \sqrt{3} \: cm \\ \\ perimeter \\ 3 \times 18 = 54 \: cm \\ \\ area \\ \frac{ \sqrt{3} }{4} \times 18 \times 18 \\ = 81 \sqrt{3} \: {cm}^{2}$