Fix require to include ./

src/about_triangle_project_2.rb

@@ -1,7 +1,7 @@
 require File.expand_path(File.dirname(__FILE__) + '/neo')
 
 # You need to write the triangle method in the file 'triangle.rb'
-require 'triangle.rb'
+require './triangle.rb'
 
 class AboutTriangleProject2 < Neo::Koan
   # The first assignment did not talk about how to handle errors.
@@ -14,4 +14,3 @@ class AboutTriangleProject2 < Neo::Koan
     # HINT: for tips, see http://stackoverflow.com/questions/3834203/ruby-koan-151-raising-exceptions
   end
 end
-