A large region of forest has been infested with gypsy moths. The region is roughly triangular, as shown in the figure on the next page. From the northernmost vertex A of the region, the distances to the other vertices are x = 25 miles south and 10 miles east (for vertex B), and 20 miles south and 28 miles east (for vertex C). Use a graphing utility to approximate the number of square miles in this region.
?
?
A. 250 mi2
B. 280 mi2
C. 260 mi2
D. 290 mi2
E. 270 mi2
Answer: A
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