Axiom 2. A straight line can extend at will.
Axiom 3. You can draw a circle with any point as the center and any length as the radius. (axiom of circle)
Axiom 4. All right angles are the same. (Angle axiom)
Axiom 5, slightly beyond the straight line, there is exactly a straight line parallel to the known straight line. (parallel axiom)
The axiom 1 means that the same quantity is equal to each other.
Axiom 2, the same amount plus the same amount, and still equal.
Axiom 3, equal minus equal, difference or equal.
Axiom 4. Objects that can coincide with each other are congruent.
Axiom 5, the whole is greater than the parts.