Question

an equilateral triangle shaped wire is rebent to form a circular ring the radius of the ring so formed is

Answer 1

Aloha!

So, here the perimeter will remain same.

That is

a + a + a = 2πr

3a = 2πr

r = $\frac{3a}{2\pi}$

Answer 2

let one side of the equilateral triangle is x cm .

so perimeter of equilateral triangle = circumference of the sircle formed .

let r be the radius

so,

3x = 2πr

r = 3x / 2π