isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?
a^2 + b^2 = c^2
let c = distance from starting point.
(3)^2 + (5)^2 = c^2
9 + 25 = c^2
34 = c^2
sqrt{34} = sqrt{c^2}
sqrt{34} = c
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