Arrel quadrada

- Numerical calculation method. At each step it asks for the appropriate digit and gives directions as to which it should be.
- Geometric method. Geometric calculation of the square root using the height theorem in right triangles.
- Continued fractions. Approximation of the root using continued fractions. R. Bombelli (16th century).
- Babylon The method used in the ancient Babylonian civilization (1500 AD).