1. Warm up
The rectangles are similar. Find x. x 1

2. Lynn DeRosa Carole McMahon Carol Herb
The Golden Ratio
Lynn DeRosa
Carole McMahon
Carol Herb

4. Sunflowers and Pinecones
Golden Ratio In Nature
the Human body
Shells
Sunflowers and Pinecones
Moths and Butterflies
Spiral Growth

5. Golden Ratios in the Human Body
Total Height : Navel to Floor
Length of Index Finger : Length from Finger Tip to Knuckle
Length of Arm : Length Finger Tip to Elbow
Combined Length of two Center Teeth : Height of the Center Teeth

6. The Pyramids of Giza Parthenon Virtruvian Man Mona Lisa
The Golden Ratio in Art and Architecture
The Pyramids of Giza Parthenon Virtruvian Man Mona Lisa

7. Euclid described the Golden Ratio as the Golden Section, a line segment divided according to the golden ratio.

8. Fibonacci’s ratios and the Golden Rectangles
1, 1, 2, 3, 5, 8, 13, 21,….
As you go farther and farther to the right of the sequence, the ratio of a term to the one before it will get closer and closer to the Golden Ratio. Continue adding squares whose sides are the longer side of the rectangle.

9. YouTube Video on Golden Ratio