What is the perimeter of a regular polygon with sides of length 12 cm and internal angles measuring 84° each?	Choose the most appropriate option.
A) 45 cm B) 108 cm C) 120 cm D) 132 cm E) 144 cm
Sum of all interior angles is given by:   180(n-2) = n is number of sides   180(n-2) = 84*n   from here   n = 3.75   So perimeter becomes 12*3.75= 
<gadget id="calculator">12*3.75</gadget>
<output>45</output>
45   answer 45 cm
<result>A</result>
What is the perimeter of a regular polygon with sides of length 12 cm and internal angles measuring 84° each?