Which mathematical principle is commonly used in high-end retail store layouts to create aesthetically pleasing product displays and optimize customer navigation patterns?

Retail analytics often incorporates mathematical principles to optimize store layouts and customer flow. One fascinating intersection of mathematics and retail design involves the use of specific ratios and proportions that have been proven to enhance customer experience and increase sales. Test your knowledge about how advanced mathematical concepts are applied in modern retail environments.

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The Golden Ratio (approximately 1:1.618)
Euler's Identity (e^(iπ) + 1 = 0)
The Pythagorean Theorem (a² + b² = c²)
The Fibonacci Sequence (where each number is the sum of the two preceding ones, but not directly applied as a ratio)