Ruby Koan 151 raising exceptions

Question

I\'m going through the ruby koans, I\'m on 151 and I just hit a brick wall.

Here is the koan:

# You need to write the triangle method in the file \'trian         


        

Answer 1

your previous triangle method should appear here

class TriangleError < StandardError
end

def triangle(x,y,z)
  if(x>=y+z||y>=x+z||z>=x+y)
    raise TriangleError,"impossible triangle"
  elsif(x==0&&y==0&&z==0)||(x<0||y<0||z<0)
    raise TriangleError,"length cannot be zero or negative"
  elsif(x==y&&x==z)
    :equilateral
  elsif(x==y||y==z||x==z)
    :isosceles
  else
    :scalene
  end
end