Enter the hypotenuse and the length of the known side into the Reverse Hypotenuse Calculator. The calculator will evaluate and display the length of the missing side.

## Reverse Hypotenuse Formula

The following formula is used to calculate the Reverse Hypotenuse.

S2 = SQRT( H^2-S1^2)

• Where S2 is the length of the unknown side
• H is the hypotenuse
• S1 is the length of the known side

## How to Calculate Reverse Hypotenuse?

The following example problems outline how to calculate Reverse Hypotenuse.

Example Problem #1:

1. First, determine the hypotenuse.
• The hypotenuse is given as: 50.
2. Next, determine the length of the known side.
• The length of the known side is provided as: 20.
3. Finally, calculate the Reverse Hypotenuse using the equation above:

S2 = SQRT( H^2-S1^2)

The values given above are inserted into the equation below and the solution is calculated:

S2 = sqrt( 50^2-20^2) = 45.825

Example Problem #2:

For this problem, the variables required are provided below:

hypotenuse = 30

length of known side = 10