Logarithmic helix ρ = a * e k θ

Archimedean spiral ρ= a *θ

Quadratic helix ρ=a*θ? (There are three spirals, etc. )

Fibonacci spiral is an iterative spiral with Fibonacci number 1, 1, 2, 3, 5 ... like a square with sides.

There are more spirals in three-dimensional space.

Spring helix, double helix structure of DNA, conical helix and so on. .