Question

Find the length of the third side. 9 7 A) 49 B) 125 C) 130 D) v 65

Answer 1

In any right triangle whose sides are a, b, c and c is the opposite side to the right angle, then

`c^2=a^2+b^2`

In the given figure, let

a = 7, b = 9

We need to find c

By using the rule above

`\begin{gathered} c^2=(7)^2+(9)^2 \\ c^2=49+81 \\ c^2=130 \end{gathered}`

Take a square root for both sides

`c=\sqrt[]{130}`

The answer is C