MODULE 1: MATHEMATICS IN OUR WORLD WHAT IS MATHEMATICS: The beautiful never lacks proportion (PLATO) If it contains the golden ratio (EUCLID) THE GOLDEN RATIO IN MATHEMATICS IS: 𝟏+√𝟓 𝟐 GOLDEN RATIO: In Mathematics and the arts, two quantities are in the golden ratio if the ratio between the sum of those quantities and the larger one is the same as the ratio between the larger one and the smaller one. Value of golden ratio: 1.618033 𝒂+𝒃 𝒂 = 𝒂 𝒃 𝝋 FIBONNACI SEQUENCE: The sequence begins with zero, each subsequent number is the sum of the two preceding numbers. 𝒇(𝒏) = 𝒇(𝒏 − 𝟏) + 𝒇(𝒏 − 𝟐) FIBONACCI SPIRAL: Constructed by placing together rectangles of relative side lengths equaling Fibonacci numbers.