Collinear points
Three non-collinear points always define exactly one and only one plane. That's why a 3-legged table or chair never wobbles.
Yes.
For instance a plane.
False. Three collinear points determine a line while three non-collinear points determine a plane ( A Triangle)
Collinear points
There are an infinite number of any kind of points in any plane. But once you have three ( 3 ) non-collinear points, you know exactly which plane they're in, because there's no other plane that contains the same three non-collinear points.
I think you mean: Are any three points contained in exactly one plane? only if they're not collinear... I think
When you have three collinear points there is one gradient. I'm not sure what your question is specifically but when points are collinear they have the same gradient.
Three non-collinear points always define exactly one and only one plane. That's why a 3-legged table or chair never wobbles.
3 non-collinear points define one plane.
Yes.
Three
For instance a plane.
False. Three collinear points determine a line while three non-collinear points determine a plane ( A Triangle)
Yes. You require three non-collinear points to uniquely define a plane!
Three, provided they are not collinear.