Enter the side length in the first triangle and the side length in the second triangle into the Similarity Ratio Calculator. The calculator will evaluate and display the Similarity Ratio.

## Similarity Ratio Formula

The following formula is used to calculate the Similarity Ratio.

**SR = S1 / S2**

- Where SR is the Similarity Ratio ( )
- S1 is the side length in the first triangle
- S2 is the side length in the second triangle

## How to Calculate Similarity Ratio?

The following example problems outline how to calculate Similarity Ratio.

Example Problem #1:

- First, determine the side length in the first triangle.
- The side length in the first triangle is given as: 6.

- Next, determine the side length in the second triangle.
- The side length in the second triangle is provided as: 10.

- Finally, calculate the Similarity Ratio using the equation above:

SR = S1 / S2

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

SR = 6 / 10 = .60 ( )

Example Problem #2:** **

For this problem, the variables required are provided below:

side length in the first triangle = 7

side length in the second triangle = 12

Test your knowledge using the equation and check your answer with the calculator above.

SR = S1 / S2** = ?**