The area of a triangle will be when a = 1m, b = 4m, c = 5m, a, b, c being lengths of respective sides?	Select:
A) 2
B) 7
C) 5
D) 3
E) 4
S = (1 + 4 + 5)/2= 
<gadget id="calculator">(1 + 4 + 5)/2</gadget>
<output>5</output>
5   Answer: 5
<result>C</result>
The area of a triangle will be when a = 1m, b = 4m, c = 5m, a, b, c being lengths of respective sides?