What is the area of a square field whose diagonal of length 20 m?
Choose one.
A) 300 sq m  B) 250 sq m  C) 200 sq m  D) 400 sq m  E) 450 sq m
Explanation:   d2/2 = (20 * 20)/2= 
<gadget id="calculator">(20 * 20)/2</gadget>
<output>200</output>
200   ANSWER IS 200 sq m
<result>C</result>
What is the area of a square field whose diagonal of length 20 m?