Answer:
x ≈ 7.42 ( to 2 dec. places )
Explanation:
Since the triangle is right use Pythagoras' identity to solve for x
The square on the hypotenuse is equal to the sum of the squares on the other two sides, that is
x² + 3² = 8²
x² + 9 = 64 ( subtract 9 from both sides )
x² = 55 ( take the square root of both sides )
x =
≈ 7.42