A right triangle has legs with lengths of 9 units and 40 units, respectively. What is the length of the hypotenuse?

This question is all about Pythagorean's Theorem, which is: a² + b² = c², where c is always the length of the hypotenuse. Using this, we can solve this problem quickly by substituting in the numerical values for the variables.

9² + 40² = c²

81 + 1600 = c²

1681 = c²

41 = c, or hypotenuse