If each interior angle of a regular polygon is 150 degrees, then it is

(1)Octagon			(2)	Decagon
(3)Dodecagon			(4)	Tetrahedron

The sum of the exterior angle and interior angle of a regular polygon is 360⁰.

As the measure of each interior angle is 1500, the measure of each exterior angle will be 30⁰.

The number of sides of a regular polygon is given by the following relationship n = 360/exterior angle

As the value of each exterior angle is 30⁰, the number of sides = 12.

yes ,correct answer is (3) .i.e Dodecagon

For do-decagon sides = 12