SOLUTION
We will use the Pythagorean theorem to solve the question below.
From the Pythagorean theorem
[tex]\text{hypotenuse}^2=opposite^2+adjacent^2[/tex]
Hypotenuse is the longest side. And here, it represents
[tex]x[/tex]
So this means that
[tex]\begin{gathered} x^2=4^2+1^2 \\ \\ x^2=(4\times4)+(1\times1) \\ \\ x^2=16+1 \\ \\ \text{square root both sides } \\ \\ \sqrt[]{x^2}=\sqrt[]{17} \\ \\ x=\sqrt[]{17} \end{gathered}[/tex]
