What is the perimeter of a regular polygon with sides of length 15 cm and internal angles measuring 160° each? Choose the correct answer:  A) 96 cm  B) 108 cm  C) 120 cm  D) 132 cm  E) 270 cm
Sum of all interior angles is given by:   180(n-2) = n is number of sides   180(n-2) = 160*n   from here   n = 18   So perimeter becomes 15*18= 
<gadget id="calculator">15*18</gadget>
<output>270</output>
270   Answer :270 cm
<result>E</result>
What is the perimeter of a regular polygon with sides of length 15 cm and internal angles measuring 160° each?