Question

Find the value of x. If​ necessary, write your answer in the simplest radical form.

Answer 1

Answer is = 90°

Hope this helps

Answer 2

x = 4
`√(5)`

Explanation:

Using Pythagoras' identity in the right triangle.

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

x² + 1² = 9²

x² + 1 = 81 ( subtract 1 from both sides )

x² = 80 ( take square root of both sides )

x =
`√(80)` =
`√(16(5))` =
`√(16)` ×
`√(5)` = 4
`√(5)`