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