Question

The height of an equilateral triangle is 18 meters. Find the perimeter of the triangle

Answer 1

`h=18=(a\sqrt3)/(2)\\\\18=(a\sqrt3)/(2)\\ 36=a\sqrt3\\ a=(36)/(\sqrt3)\\ a=(36\sqrt3)/(3)\\ a=12\sqrt3\\\\ p=3a\\ p=3\cdot12\sqrt3\\ p=36\sqrt3`