euclidean geometry
- Any two points can be joined by a straight line.
- Any finite straight line can be extended in a straight line.
- A circle can be drawn with any center and any radius.
- All right angles are equal to each other.
- If two straight lines in a plane are crossed by another straight line (call
make the English easier to read.
Any two points can be joined by a straight line.
Any finite straight line can be extended in a straight line.
A circle can be drawn with any center and any radius.
All right angles are equal to each other.
If two straight lines in a plane are crossed by another straight line (called the transversal), and the interior angles between the two lines and the transversal lying on one side of the transversal add up to less than two right angles, then on that side of the transversal, the two lines extended will intersect (also called the parallel postulate).