always
Three coplanar points are always collinear if they lie on a single straight line. However, if they do not lie on the same straight line, they are not collinear. Thus, coplanar points can be either collinear or non-collinear, but they cannot be sometimes collinear; the relationship is definitive based on their arrangement.
Three non-collinear points always define exactly one and only one plane. That's why a 3-legged table or chair never wobbles.
Plane. (That's why a 3-legged stool never wobbles.)
No, collinear refers to two different points that exist on a single line. Parallel means that 2 lines exist on the same plane, and will never intersect, no matter how far they are extended.
It contains the whole line.
sometimes
Three coplanar points are always collinear if they lie on a single straight line. However, if they do not lie on the same straight line, they are not collinear. Thus, coplanar points can be either collinear or non-collinear, but they cannot be sometimes collinear; the relationship is definitive based on their arrangement.
Never. They are points on the same line. *------*
Three non-collinear points always define exactly one and only one plane. That's why a 3-legged table or chair never wobbles.
Sometimes.
always
Plane. (That's why a 3-legged stool never wobbles.)
No, collinear refers to two different points that exist on a single line. Parallel means that 2 lines exist on the same plane, and will never intersect, no matter how far they are extended.
It contains the whole line.
The moon.
The moon.
parallellines