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The golden section is a line segment sectioned into two according to the golden ratio. The total length a+b is to the longer segment a as a is to the shorter segment b.
Leonardo Da Vinci's illustration from De Divina Proportione applies geometric proportions to the human face.
A pentagram colored to distinguish its line segments of different lengths. The four lengths are in golden ratio to one another.
A Fibonacci spiral that approximates the golden spiral, using Fibonacci sequence square sizes up to 34.
A regular square pyramid is determined by its medial right triangle, whose edges are the pyramid's apothem (a), semi-base (b), and height (h); the face inclination angle is also marked. Mathematical proportions b:h:a of and and are of particular interest in relation to Egyptian pyramids.
The sculpture Ratio by Andrew Rogers in Jerusalem is proportioned according to Fibonacci numbers; some call it Golden Ratio.
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