What is the area of a square field whose diagonal of length 12 m?	Pick one:
A) 288
B) 72
C) 200
D) 112
E) 178
d2/2 = (12 * 12)/2= 
<gadget id="calculator">(12 * 12)/2</gadget>
<output>72</output>
72   Answer: 72
<result>B</result>
What is the area of a square field whose diagonal of length 12 m?