Answer: The value of the missing side is approximately 5.83 cm.
Explanation: The missing side is the hypotenuse of the right triangle. It can be calculated using the Pythagorean theorem, which states that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides. So, in this case, we can find the missing side as follows:
c^2 = a^2 + b^2
c^2 = 3^2 + 5^2
c^2 = 9 + 25
c^2 = 34
c = sqrt(34)
c = approximately 5.83 cm
So the missing side, or the hypotenuse, is approximately 5.83 cm.