Triangle

gistfile1.rb

def triangle(num1,num2,num3)
  if num1 >= num2 + num3 || num2 >= num1 + num3 || num3 >= num2 + num1
    :invalid
  elsif num1 == num2 && num2 == num3 && num3 == num1
    :equilateral
  elsif num1 == num2 || num2 == num3 || num3 == num1
     :isosceles
  elsif num1 != num2 && num2 != num3 && num3 != num1
    :scalene
  end
end

puts triangle(8,8,8)
puts triangle(8,8,6)
puts triangle(8,9,10)
puts triangle(2,2,8)