class Silicium::Geometry::Triangle
Public Class Methods
new(p1, p2, p3)
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# File lib/geometry/figure.rb, line 10 def initialize(p1, p2, p3) s_p1p2 = distance_point_to_point2d(p1, p2) s_p1p3 = distance_point_to_point2d(p1, p3) s_p2p3 = distance_point_to_point2d(p2, p3) if s_p1p2 + s_p2p3 <= s_p1p3 || s_p1p2 + s_p1p3 <= s_p2p3 || s_p2p3 + s_p1p3 <= s_p1p2 raise ArgumentError, 'Triangle does not exist' else @side_p1p2 = s_p1p2 @side_p1p3 = s_p1p3 @side_p2p3 = s_p2p3 end end
Public Instance Methods
area()
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# File lib/geometry/figure.rb, line 27 def area half_perimeter = perimeter / 2.0 Math.sqrt(half_perimeter * (half_perimeter - @side_p1p2) * (half_perimeter - @side_p2p3) * (half_perimeter - @side_p1p3)) end
perimeter()
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# File lib/geometry/figure.rb, line 23 def perimeter @side_p1p2 + @side_p1p3 + @side_p2p3 end