Question

help me to do this problem

Answer 1

$ac ^{2} = {ab}^{2} + {bc}^{2} \\ ac = \sqrt{ {ab}^{2} + {bc}^{2} } \\ ac = \sqrt{ {12}^{2} + {4}^{2} } \\ ac = \sqrt{144 + 16} \\ ac = \sqrt{160} \\ ac = \sqrt{16\times10} \\ ac = 4 \sqrt{10} m$

Answer 2

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Step-by-step explanation: