Final answer:
The Pythagorean theorem can be used to find the length of a side in a right triangle.
Step-by-step explanation:
The Pythagorean theorem states that in a right triangle, the sum of the squares of the lengths of the two legs, labeled a and b, is equal to the square of the length of the hypotenuse, labeled c. The formula for the Pythagorean theorem is a² + b² = c². To find the length of side b in the given right triangle, we can rearrange the formula as b = √(c² - a²). Since the length of side a is not given, we can't calculate the exact length of side b. Therefore, we cannot determine the correct answer choice from the given options.