If the area of an equilateral triangle is 25√3 cm2, then its perimeter = ____ cm.
10
30
45
60
Area of an equilateral triangle with side 'a' is given by √34 a2. Given, area = 25√3 cm2
⟹25√3=√34 a2
⟹ a2=52×22
∴a=10 cm
Then, Perimeter =3a
= 3(10)
= 30 cm
If the area of an equilateral triangle is 25√3 cm2, then its perimeter = _____________________ cm.
If the area of an equilateral triangle is 36√3 cm2, find its perimeter.
The area of an equilateral triangle is 4 √3 cm2. Its perimeter is
(a) 9 cm (b) 12 cm (c) 12√3 cm (d) 6√3 cm