Question

find the area of equilatral triangle whose sides is a also find area if perimeter is 120
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Answer 1

Answer:

side of equilatral triangle = 40

Area of the triangle =

$400 \sqrt{3}$

Step-by-step explanation:

side of triangle = perimeter of triangle /3

= 120/3

= 40

Area of the triangle =

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

$\frac{ \sqrt{3} }{4} \times 40^{2} \\ \frac{ \sqrt{3}}{4 } \times 1600 \\ \sqrt{3} \times 400 \\ 400 \sqrt{3}$