Question

a wire has resistance 12ohm if it bent in the form of a equilateral triangle . the resistance between any two terninal is

Answer 1

the resistance between two terminals will be 12/3 =:4 ohm

Answer 2

Given that a wire of resistance of 12 Ohm is bent in the form of a circle ( let us assume that the ends are not connected to the each other).
The effective resistance between two points on any diameter = Half of the resistance of the previous case, because the length of the wire is half of the previous case.