Question

3. If the area of the equilateral triangle is 36V3 cm2 then its perimeter is a) 64cm b) 60 cm c) 36cm d) none of these​

Answer 1

Now it is given that the area of the equilateral triangle is 363–√ cm2.

So equate this value to the formula of the area of the equilateral triangle and calculate the length of the side.

√3/4a^2=36√ 3

⇒a2=36×4=144=(12)2

⇒a=12 cm

So the side of the equilateral triangle is 12 cm.

Now calculate the perimeter of the equilateral triangle according to equation (1) we have,

⇒S=3a=3×12=36 cm.

So the perimeter of the equilateral triangle is 36 cm.

So this is the required answer.

Answer 2

36 CM

hope it help you

hope it help you