- famous numbers
- f(x)=a^x, g(x)=log_a(x)
- area of a circle-1
- the golden ratio
- Fibonacci spiral
- the golden ratio (and aphrodite's phi)
- approximating pi
- regular pentagon
- golden ratio-3
- golden triangle
- golden rectangle
- approximating pi...
- the exponential and the logarithmic functions
- the golden ratio and aphrodite's phi
- trigonometry_unit circle
- basic trig numbers-2
- basic trig numbers-1
- approximating pi-1
- square numbers
- triangular numbers
- triangular numbers-1
- pythagorean triples-euclid
- pythagorean triples-plato
- pythagorean triples-proclus
- pascal's triangle
- a multiplication table
- circumference of circles-1
