The document discusses the Golden ratio and how it appears in art and architecture throughout history. It provides examples of the Great Pyramid of Giza, works by Leonardo Da Vinci including the Mona Lisa and The Last Supper, and Da Vinci's famous drawing of the Vitruvian Man, all incorporating the Golden ratio in their design and proportions. The Golden ratio is a mathematical constant around 1.618 widely considered aesthetically pleasing and found in natural forms.

1. The Golden section in Art and Architecture

2. The Golden Rectangle aba/b = (a+b)/aThis fraction, (a+b)/a, is called the golden ratio.ababA golden rectangle, based on Fibonacci series, is one whose side lengths are in the golden ratio.

3. The Great Pyramid of GizaIt is one of the oldest structures on the face of the Earth and was built around 2560 BC .This Egyptian pyramid is remarkably close to a "golden pyramid"

4. Leonardo Di Vinci He was an internationally renowned inventor, scientists, engineer, architect, painter, sculptor, musician, mathematician, anatomist, astronomerand philosopher in his time.

5. The study of perspective mean became an obsession for him.

6. He constantly tried to explain what he saw and devised many experiments to test his ideas.

7. He was among the very first to take a scientific approach towards understanding how the world works and how we perceive it.Mona Lisa One very famous piece, known as the Mona Lisa, painted by Leonardo Da Vinci, is drawn according to the golden ratio.