If the sum of the interior angles of a regular polygon measures up to 1620 degrees, then how many sides does the polygon have? Choose the correct choice from the following:  A) 10  B) 16  C) 12  D) 11  E) 14
one of the interior angle = 180 - 360/n   sum of the interior angles is = n (180 - 360/n)   given   n(180 - 360/n)=1620   180n - 360 = 1620   180n = 1980   n = 1980/180= 
<gadget id="calculator">1980/180</gadget>
<output>11</output>
11   ANSWER:11
<result>D</result>
If the sum of the interior angles of a regular polygon measures up to 1620 degrees, then how many sides does the polygon have?