quadrilateral.rb

module EqualL
	def side
		@side1
	end
end

class Quadrilateral
	def initialize(side1, side2, side3, side4)
		@side1 = side1
		@side2 = side2
		@side3 = side3
		@side4 = side4
	end

	def perimeter
	(@side1.to_i + @side2.to_i + @side3.to_i + @side4.to_i)
	end

end

class Trapeziod < Quadrilateral
end

class Rhombus < Quadrilateral
	def initialize(side1)
	 	super(side1, side1, side1, side1)
	 end
	include EqualL
end

class Rectangle < Quadrilateral
	def initialize(a,b)
	 	super(a,b,a,b)
	 end

	 def area
	 	@side1 * @side2
	 end
end

class Square < Rectangle
	 def initialize(side1)
	 	super(side1, side1)
	 end
	 include EqualL
end

def test
rhom = Rhombus.new(2)
rect = Rectangle.new(1,2)
squa = Square.new(1)
trap = Trapeziod.new(2,3,4,4)
puts squa.is_a? Rectangle
puts squa.is_a? Quadrilateral
puts squa.is_a? Rectangle
puts rect.perimeter == 6
puts squa.perimeter == 4
puts rhom.perimeter == 8
puts trap.perimeter == 13
puts squa.area == 1
puts squa.side == 1
puts rect.area == 2
puts squa.side == 1
puts rhom.side == 2
end


test