The sides of a triangle are in the ratio 5: 12: 13 and its perimeter is 180 m, its area is? Choose the correct choice from the following choices.
A) 90	B) 882	C) 277	D) 261	E) 281
5x + 12x + 13x = 180 =&gt; x = 6   a = 30, b = 72, c = 78   S = (30 + 72 + 78)/2= 
<gadget id="calculator">(30 + 72 + 78)/2</gadget>
<output>90</output>
90   90nswer: 90
<result>A</result>
The sides of a triangle are in the ratio 5: 12: 13 and its perimeter is 180 m, its area is?