Answer:
40
Step-by-step explanation:
Since the triangle is right, use Pythagoras' identity to solve for the third side
let the third side = x, then
9² + x² = 41²
81 + x² = 1681 ( subtract 81 from both sides )
x² = 1600 ( take the square root of both sides )
x = [tex]\sqrt{1600}[/tex] = 40
