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class Shape
  attr_reader :color

  def initialize(color)
    @color = color
  end

  def can_fit?(shape)
    self.area < shape.area ? true : false
  end

  def can_fit(shape)
    self.area / shape.area
  end

end


class Rectangle < Shape

  def initialize(width, height, color = "Red")
    super(color)
    @width = width
    @height = height
  end

  def area
    @width * @height
  end

end


class Square < Shape

  def initialize(side, color = "Red")
    super(color)
    @side = side
  end

  def area
    @side * @side
  end

end 


class Circle < Shape

  def initialize(radius, color = "Red")
    super(color)
    @radius = radius
  end

  def area
    @radius ** 2 * Math::PI
  end

end