Question

Perimeter of a equilateral triangle is 60cm.what will be its area

Answer 1

Answer: Area of equilateral triangle is 10√3

Step-by-step explanation:

Perimeter= 60

Formula= perimeter of triangle= 3a (where a is side)

Then, side= 60/3= 20cm

Area of equilateral triangle= √3/4*a square

Now we put value of a=20

√3/4*20*20=100√3=10√3 (Answer)

Answer 2

Answer:

Step-by-step explanation :

Let the side of the triangle be x

So x+x+x =60

      3x=60

     x=60/3

    therefore , x=20

Area=root 3/4 (side)^2

         =root 3/4 (20)^2

       =root 3/4 (400)

        =root 3 (100)

        =100 of root 3

Therefore the area of the equilateral triangle is 100 root of 3