Answer
6
Work Step by Step
We use the Pythagorean Theorem:
$a^{2}$+$b^{2}$=$c^{2}$
$(2\sqrt 3)^{2}$+$(2\sqrt 6)^{2}$=$c^{2}$
12+24=$c^{2}$
36=$c^{2}$
6=c
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