Question

If G and H are different points in plane R, then a third point exists in R not on .



Postulate 1: A line contains at least two points.
Postulate 1a: A plane contains at least three points not all on one line.
Postulate 1b: Space contains at least four points not all on one plane.
Postulate 2: Through any two different points, exactly one line exists.
Postulate 3: Through any three points that are not one line, exactly one plane exists.
Postulate 4: If two points lie in a plane, the line containing them lies in that plane.
Postulate 5: If two planes intersect, then their intersectio

Answer 1

> then a third point exists in R not on .

Not on what?
@brittany1234

Answer 2

If G and H are different points in plane R, then a third point exists in R
not on \(\text{the line, but in the plane }\)R.

...

Postulate 5: If two planes intersect, then their intersectio\(\text{n will}\)
\(\text{be a line, assuming the planes are not the same}\)