What is the area of a square field whose diagonal of length 20 m?	Pick
A) 300 sq m	B) 250 sq m	C) 200 sq m	D) 400 sq m	E) 800 sq m
d2/2 = (20 * 20)/2= 
<gadget id="calculator">(20 * 20)/2</gadget>
<output>200</output>
200   ANSWER:200 sq m
<result>C</result>
What is the area of a square field whose diagonal of length 20 m?