a) A triangle with side a that is equilateral.
Number of loops = 4
A = √3/4 a2
m = Ia2√3 is the magnetic moment.
b) In the case of a square with sides of a
A = a2
Number of loops = 3
m = 3Ia2 magnetic moment
c) For a hexagon with sides of a regular hexagon with sides of a
A = 6√3/4 a2
No.of loops = 2
Magnetic moment, m = 3√3a2I