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Question #e413f

1 Answer

Feb 27, 2017

78.

Explanation:

Use the pythagorean theorem:
$a^2 + b^2 = c^2$

$AC^2 + BC^2 = sqrt(AB)$

$72^2 + 30^2 = sqrt(AB)$
$AB = sqrt(6084)$

$AB = 78$

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