Answer:
x ≈ 10,54 units
Step-by-step 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 + 17² = 20²
x² + 289 = 400 ( subtract 289 from both sides )
x² = 111 ( take the square root of both sides )
x = [tex]\sqrt{111}[/tex] ≈ 10.54 ( to 2 dec. places )
