Geography. The formula A [s(s a)(s b)(s c)]1/2m = gives the area of a triangle with
Chapter 9, Problem 9.2.138(choose chapter or problem)
Geography. The formula A [s(s a)(s b)(s c)]1/2m = gives the area of a triangle with sides of length a, b, and c, where is one-half of the perimeter. Estimate the area of Virginia (to the nearest square mile) using the data given in the illustration. 370 mi220 mi430 mi
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