What is the area of a square field whose diagonal of length 20 m?	Select the correct option
A) 238	B) 379	C) 200	D) 328	E) 397
d2/2 = (20 * 20)/2= 
<gadget id="calculator">(20 * 20)/2</gadget>
<output>200</output>
200   Answer:200
<result>C</result>
What is the area of a square field whose diagonal of length 20 m?