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What an I do to get help to explain and get the answer for this

What an I do to get help to explain and get the answer for this-example-1

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Using pythagoras theorem


\begin{gathered} Hyp^2\text{ = opp}^2+adj^2 \\ x^2\text{ = (2}\sqrt[]{6)^2}+5^2 \\ x^2\text{ = 4(6) + 25} \\ x^2=24^{}+25 \\ x^2\text{ = 49} \\ x\text{ = }\sqrt[]{49} \\ x\text{ = 7} \end{gathered}

Hence the length of the third side = 7

What an I do to get help to explain and get the answer for this-example-1
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