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Which side lengths form a right triangle? Choose all answers that apply: A 3,4,5 7,8,9 3,9, 95

Which side lengths form a right triangle? Choose all answers that apply: A 3,4,5 7,8,9 3,9, 95-example-1

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To know which forms a triangle, we have to use Pythagorean's Theorem.


\begin{gathered} 5^2=3^2+4^2 \\ 25=9+16 \\ 25=25 \end{gathered}

Option A forms a right triangle.


\begin{gathered} 9^2=7^2+8^2 \\ 81=49+64 \\ 81=113 \end{gathered}

Option B doesn't form a right triangle.


\begin{gathered} (\sqrt[]{95})^2=9^2+3^2 \\ 95=81+9 \\ 95=90 \end{gathered}

Option C doesn't form a right triangle.

Hence, the answer is A.

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