The area of a triangle will be when a = 1m, b = 2m, c = 7m, a, b, c being lengths of respective sides?  Select the correct option.
A) 3  B) 6  C) 5  D) 9  E) 1
S = (1 + 2 + 7)/2= 
<gadget id="calculator">(1 + 2 + 7)/2</gadget>
<output>5</output>
5 Answer:5
<result>C</result>
The area of a triangle will be when a = 1m, b = 2m, c = 7m, a, b, c being lengths of respective sides?