Question

Answer this for me pls

Answer 1

`√(10)`

Explanation:

Let the third side be x

Using Pythagoras' identity on the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 9² = (
`√(91)`)², that is

x² + 81 = 91 ( subtract 81 from both sides )

x² = 10 ( take the square root of both sides )

x =
`√(10)`