Respuesta :

The formula you need to use is a^2 + b^2 = c^2. A is the side of 3 and B is the side of 7, so 3^2 + 7^2 = c^2.
9 + 49 = c^2
58 = c^2
√58 = C
So your answer is C. √58. I hope this helps!
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