Respuesta :

Using the Pythagorean theorem

[tex]a^2+b^2=c^2[/tex]

solve for the side

[tex]\begin{gathered} a^2=c^2-b^2 \\ a=\sqrt[]{c^2-b^2} \\ a=\sqrt[]{10^2-(\sqrt[]{19})^2} \\ a=\sqrt[]{100-19} \\ a=\sqrt[]{81} \\ a=9 \end{gathered}[/tex]

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