Question

find the area of an equilateral triangle, the length of whose sides is 12 cm​

Answer 1

Answer:

22.5166605 sq.cm

Step-by-step explanation:

$\delta=\frac{\sqrt{3}a^2}{4} \\a=12cm\\\delta=144\sqrt{3}/4=38\sqrt{3}$ or  22.5166605 sq.cm

Answer 2

Answer:

36√3

Step-by-step explanation:

Area of Equilateral triangle =

$\frac{ \sqrt{3} }{4} \times {a}^{2}$

So,

$\frac{ \sqrt{3} }{4} \times {12}^{2}$

$\frac{ \sqrt{3} }{4} \times 144$

$\sqrt{3 \times 36}$

$36 \sqrt{3}$

Answer