Class: Triangle

Inherits:
Polygon show all
Defined in:
lib/shapedoc.rb

Instance Attribute Summary collapse

Attributes inherited from Polygon

#sides

Instance Method Summary collapse

Methods inherited from Polygon

#perimeter

Constructor Details

#initialize(s1, s2, s3, arg = Hash.new) ⇒ Triangle

Returns a new instance of Triangle.



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# File 'lib/shapedoc.rb', line 53

def initialize(s1, s2, s3, arg = Hash.new); @base, @height, @sides = arg[:base], arg[:height], [s1, s2, s3]; end

Instance Attribute Details

#base ⇒ Object (readonly)

Returns the value of attribute base.



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# File 'lib/shapedoc.rb', line 52

def base
  @base
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/shapedoc.rb', line 52

def height
  @height
end

Instance Method Details

#_sides ⇒ Object 



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# File 'lib/shapedoc.rb', line 51

def _sides; 3; end

#area ⇒ Object 



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# File 'lib/shapedoc.rb', line 54

def area; (@base*@height)/2; end

#diagram ⇒ Object 



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# File 'lib/shapedoc.rb', line 55

def diagram
  if self.equilateral?; "\u25b3"
  else; "\u22bf"; end
end

#equilateral? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/shapedoc.rb', line 59

def equilateral?
  s, eq = @sides[1], true
  for side in @sides
    eq = false unless side == s
    s = side
  end
  return eq
end

#isosceles? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/shapedoc.rb', line 67

def isosceles?
  unless self.equilateral?
    if (@sides[0] == @sides[1] && @sides[0] != @sides[2]) || (@sides[0] != @sides[1] && @sides[0] == @sides[2]); return true
    else return false
    end
  else; return false
  end
end

#scalene? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/shapedoc.rb', line 75

def scalene?
  true unless self.equilateral? || self.isosceles?
end