Answer:
D
Step-by-step explanation:
The area (A) of an equilateral triangle is calculated as
A = [tex]\frac{s^2\sqrt{3} }{4}[/tex] ← s is length of a side
Here s = 12, thus
A = [tex]\frac{12^2\sqrt{3} }{4}[/tex]
= [tex]\frac{144\sqrt{3} }{4}[/tex]
= 36[tex]\sqrt{3}[/tex] → D
