Class: Geometry::Circle

Inherits:

Object

• Object
• Geometry::Circle

Defined in:

lib/geometry-mc.rb

Instance Attribute Summary

• #r ⇒ Object

  Returns the value of attribute r.

Instance Method Summary

• #area ⇒ Object
• #initialize(r) ⇒ Circle constructor

  A new instance of Circle.

• #perimeter ⇒ Object

Constructor Details

#initialize(r) ⇒ Circle

Returns a new instance of Circle.

# File 'lib/geometry-mc.rb', line 37

def initialize(r)
  @r = r
  @d = 2 * r
end

Instance Attribute Details

#r ⇒ Object

Returns the value of attribute r.

# File 'lib/geometry-mc.rb', line 35

def r
  @r
end

Instance Method Details

#area ⇒ Object

# File 'lib/geometry-mc.rb', line 42

def area
  Math::PI * (@r ** 2)
end

#perimeter ⇒ Object

# File 'lib/geometry-mc.rb', line 46

def perimeter
  Math::PI * @d
end