Question

the side of an equilateral triangle is 6 CM then its area is :

Answer 1

HEY MATE HERE IS YOUR ANSWER
$area \: of \: equilateral \: triangle \: = \frac{ \sqrt{3} }{4} {s}^{2} \\ s = side \: of \: \: triangle \: \\ side = 6cm \\ \frac{ \sqrt{3} }{4} \times {6}^{2} \\ \sqrt{3} \times 9 \\ 9 root3$

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Answer 2

You can do by two one is by √3/4 a² or by herons formula

Semi perimeter = a+b+c /2

= 6+6+6/2

= 18/2

= 9 cm

By using heron's formula

Area = √ S (S-a) (S-b) ( S-c)

√ 9 (9-6) (9-6) (9-6)

√ 9 (3) (3) (3)

√ (3*3) (3) (3) (3) ( Comman )

3*3 √3

9 √3 cm² answer

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