What is the perimeter of a regular polygon with sides of length 13 cm and internal angles measuring 144° each?	Answers
A) 96 cm	B) 108 cm	C) 120 cm	D) 130 cm	E) 144 cm
Sum of all interior angles is given by:   180(n-2) = n is number of sides   180(n-2) = 144*n   from here   n = 10   So perimeter becomes 13*10= 
<gadget id="calculator">13*10</gadget>
<output>130</output>
130   answer 130 cm
<result>D</result>
What is the perimeter of a regular polygon with sides of length 13 cm and internal angles measuring 144° each?