Question: In a right triangle, if one leg is 3 cm and the hypotenuse is 5 cm, what is the length of the other leg?

Options:

1. 4 cm
2. 3 cm
3. 2 cm
4. 1 cm

Correct Answer: 4 cm

Solution:

Using the Pythagorean theorem, a² + b² = c², we have 3² + b² = 5², which gives b² = 25 - 9 = 16, hence b = 4 cm.