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exactly nine planes!

* * * * *

I would have said 4 - corresponding to the four faces of a tetrahedron. Of course, non-collinear does not mean non-coplanar so all four points could be in the same single plane!

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Q: How many plane are determined by four non collinear points?
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Related questions

If four points are collinear they are also coplaner?

I dont think that "If four points are collinear they are also coplaner," is the same thing as "If four points are coplaner they are also collinear,". The definition of collinear is at least three points on the same line. To define a plane is to have threenoncollinear points.


Four points are always coplanar if they?

lie on the same plane and are collinear


Four points are alwats coplanar if they?

-lie in the same plane -are collinear


How many planes can be determined if the point noncollinear?

The answer depends on the number of point. One point - as the question states - cannot be non-collinear. Any two points are always collinear. But three or more points will define a plane. If four points are non-coplanar, they will define four planes (as in a tetrahedron).


Four points are always coplanar if?

all of them are collinear they lie in the same plane


If four points are collinear they are also coplanar?

Yes, since any line can be contained in a plane.


What is different of collinear point from non collinear point and coplanar point from non coplanar point?

Three or more points are collinear if they are all in the same straight line. They are non collinear if at least one of them is not on the same line as the rest. Four or more points are coplanar if they are all in the same plane. They are non coplanar if at least one of them is not on the same plane as the rest.


Who Four points are always coplaner if:A. They lie on different planesB. They lie on different linesC. They line in the same planeD. They are collinear?

C. They lie in the same plane D. They are collinear


Can four points be collinear?

Yes. On any straight line you can find an infinite set of 4 points which are collinear.


If four points are collinear they are also coplanar.?

Yes, they are.


If four points are collinear are they also coplanar.?

Yes, they are.


If four points are coplanar then they are also collinear?

not necassarily