What is the perimeter of a regular polygon with sides of length 10 cm and internal angles measuring 140° each?	Choose the correct choice from the following choices
A) 90 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) = 140*n   from here   n = 9   So perimeter becomes 10*9= 
<gadget id="calculator">10*9</gadget>
<output>90</output>
90   90 cmnswer: 90 cm
<result>A</result>
What is the perimeter of a regular polygon with sides of length 10 cm and internal angles measuring 140° each?