Question

Find the area of equilateral triangle whose side is 40cm,
(with explanation and also answer only the correct one)​

Answer 1

Answer:

120cm²

Step-by-step explanation:

area of the triangle = add all the sides of the triangle

= 40cm x 3

=120cm²

∴ area of the triangle =120cm²

( they are 3 are the sides of the triangle ..

 that is the reason I took 3)

Answer 2

$\sf \purple{Area \: of \: equilateral \: \triangle = \frac{ \sqrt{3} }{4} \times ({side})^{2} }$

$\sf {Area \: of \: equilateral \: \triangle = \frac{ \sqrt{3} }{4} \times ({40})^{2} }$

$\sf {Area \: of \: equilateral \: \triangle = \frac{ \sqrt{3} }{ \cancel4} \times \cancel{40} \times 40}$

$\sf {Area \: of \: equilateral \: \triangle = \sqrt{3} \times 10 \times 40 }$

$\sf{\pink{ \underline{ \underline{Area \: of \: equilateral \: \triangle = 400 \sqrt{3} \: {cm}^{2} }}} }$