2006-06-19 23:48:55 · 4 answers · asked by Mi Chii 1 in Science & Mathematics ➔ Mathematics
These are best known as "Euclid's Postulates":
1. Any two points can be joined by a straight line.
2. Any straight line segment can be extended indefinitely in a straight line.
3. Given any straight line segment, a circle can be drawn having the segment as radius and one endpoint as center.
4. All right angles are congruent.
5. Parallel postulate. If two lines intersect a third in such a way that the sum of the inner angles on one side is less than two right angles, then the two lines inevitably must intersect each other on that side if extended far enough.
2006-06-20 01:34:19 · answer #1 · answered by fredy1969 3 · 0⤊ 0⤋
1. A straight line segment can be drawn joining any two points.
2. Any straight line segment can be extended indefinitely in a straight line.
3. Given any straight line segment, a circle can be drawn having the segment as radius and one endpoint as center.
4. All right angles are congruent.
5. If two lines are drawn which intersect a third in such a way that the sum of the inner angles on one side is less than two right angles, then the two lines inevitably must intersect each other on that side if extended far enough.
2006-06-20 14:06:11 · answer #2 · answered by menezes_dean 2 · 0⤊ 0⤋
His 5 axioms
2006-06-20 12:49:46 · answer #3 · answered by Thermo 6 · 0⤊ 0⤋
http://mathworld.wolfram.com/EuclidsPostulates.html
2006-06-20 06:56:54 · answer #4 · answered by Anonymous · 0⤊ 0⤋