Question

If the perimetre of a equilateral triangle is 120 cm what is its area

Answer 1

Answer:

heya!!

Given:-

Perimeter of equilateral triangle = 120 cm

Perimeter of equilateral triangle = 3a

So,

3a = 120

a = 120/3

a = 40 cm

Area of equilateral triangle =

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

$\frac{ \sqrt{3} }{4} \times {40}^{2}$

$\frac{ \sqrt{3} }{4} \times 1600$

$\sqrt{3} \times 400$

$400 \sqrt{3}$

hope it helps you

Answer 2

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