# arrow_back What is the length of AB?

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What is the length of AB?

$3\sqrt{6}$

Explanation:

$a=\sqrt{3.5^{2}-2.5^{2}}=\sqrt{6}$
$b=\sqrt{5^{2}-1^{2}}=2 \sqrt{6}$
$A B=a+b=3 \sqrt{6}$

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