# Triangle Write a program that can tell you if a triangle is equilateral, isosceles, or scalene. The program should raise an error if the triangle cannot exist. ## Hint The sum of the lengths of any two sides of a triangle always exceeds or is equal to the length of the third side, a principle known as the _triangle inequality_. To run the tests simply run the command `go test` in the exercise directory. If the test suite contains benchmarks, you can run these with the `-bench` flag: go test -bench . For more detailed info about the Go track see the [help page](http://exercism.io/languages/go). ## Source The Ruby Koans triangle project, parts 1 & 2 [http://rubykoans.com](http://rubykoans.com) ## Submitting Incomplete Problems It's possible to submit an incomplete solution so you can see how others have completed the exercise.