In any right triangle whose sides are a, b, c and c is the opposite side to the right angle, then
[tex]c^2=a^2+b^2[/tex]In the given figure, let
a = 7, b = 9
We need to find c
By using the rule above
[tex]\begin{gathered} c^2=(7)^2+(9)^2 \\ c^2=49+81 \\ c^2=130 \end{gathered}[/tex]Take a square root for both sides
[tex]c=\sqrt[]{130}[/tex]The answer is C
