class Geometry::Circle
Attributes
r[RW]
Public Class Methods
new(r)
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# File lib/geometry-mc.rb, line 37 def initialize(r) @r = r @d = 2 * r end
Public Instance Methods
area()
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# File lib/geometry-mc.rb, line 42 def area Math::PI * (@r ** 2) end
perimeter()
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# File lib/geometry-mc.rb, line 46 def perimeter Math::PI * @d end