The area of an equilateral triangle is [tex]9\sqrt{3} /4[/tex]
Step-by-step explanation:
- Perimeter of a triangle = 3a
⇒ 9 = 3a
⇒ a = 9/3
a = 3
- Area of an equilateral triangle = [tex]\sqrt{3}/ 4\times a^{2}[/tex]
⇒ [tex]\sqrt{3}/ 4\times 3^{2}[/tex]
⇒ [tex]\sqrt{3}/ 4\times 9[/tex]
⇒ [tex]9\sqrt{3} /4[/tex]
