# Euclidean Geometry

- Author:
- Ku, Yin Bon (Albert)

- Topic:
- Geometry

The geometry that you have been learning is called

**Euclidean geometry**. It was first developed by**Euclid of Alexandria**(around 300 BC) in his book called "**The Elements**". He treated geometry as an axiomatic system:**Undefined terms**: "Points", "straight lines" and "lies on"**Axioms: five postulates****Postulate I**- To draw a straight line from any point to any point.**Postulate II**- To produce a finite straight line continuously in a straight line.**Postulate III**- To describe a circle with any center and radius.**Postulate IV**- That all right angles equal one another.**Postulate V -****Parallel Postulate**The first three postulates are related to geometric constructions.