If each interior angle of a regular polygon is 144o, the it is	Select the correct option:
A) Octagon  B) Decagon  C) Dodecagon  D) Pentagon  E) None of these
Decagon, then each ext angle = 180-44=36 deg .   sum of all ext angles = 360 deg .   Then total ext angles = 360/36= 
<gadget id="calculator">360/36</gadget>
<output>10</output>
10 means 10 sides of polygon.   ANSWER:Dodecagon
<result>C</result>
If each interior angle of a regular polygon is 144o, the it is