The Pythagorean Theorum formula is a(squared) + b(squared)= c(squared). If you plug in the numbers, the equation is 39(squared) + 80(squared)= c(squared). That simplifies to 1521+6400=c(squared). Adding results in 7921=c(squared). Finally, when you take the square root of both sides, you are left with 89=c (aka the hypotenuse)
See attachment for math work and answer.
4.05x10^5 km^<span>2 is the answer to your question.
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I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wtjfavyw
