Find the value of x in the triangle shown below.

Answer:DStep-by-step explanation:using Pythagoras' identity in the right triangle.the square on the hypotenuse is equal to the sum of thesquares on the other two sides, that isx² + 8² = 9²x² + 64 = 81 ( subtract 64 from both sides )x² = 17 ( take square root of both sides )x = [tex]\sqrt{17}[/tex]