The perimeter of an equilateral triangle is 60cm. Then its side is ___ cm .
20
60
30
40
Let the side of the equilateral triangle be ‘a’ cm.
∴a+a+a=60⇒3a = 60 cm
⇒a = 20 cm
If the area of an equilateral triangle is 25√3 cm2, then its perimeter = ____ cm.
Find the area of an equilateral triangle whose perimeter is 60 cm