matthen:The Harriss spiral is constructed from rectangles in the ratio of the plastic number (1.3247…),  in a similar way to how a Fibonacci spiral is created from rectangles in the related golden ratio (1.6180…). These plastic rectangles can be

matthen:The Harriss spiral is constructed from rectangles in the ratio of the plastic number (1.3247…),  in a similar way to how a Fibonacci spiral is created from rectangles in the related golden ratio (1.6180…). These plastic rectangles can be

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