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They are coplanar if the line joining any two of them intersects the line joining the other two.

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Q: Four points are always co planar if?
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Related questions

What is the greatest number of intersection points that four co planar lines can have?

The greatest number is six.


Are any 3 co planar points are col linear?

sometimes


Are three points colinear?

Not necessarily, eg the three points (0, 0), (1, 1) and (2,0) are not co-linear, but (0,0), (1,1) and (2,2) are. But three points are co-planar, that is they all lie in one plane.


Can four noncoplanar points be used to form two intersecting?

Since the question is unfinished, I'll assume the most obvious completion: "planes." Yes, a triangular pyramid is composed of 4 non-co-planar points which form 4 intersecting planes.


Is every set of three points coplanar?

Yes, three points define a plane. So any three points lie in some specific plane and are therefore co-planar.


Are points of a circle coplanar?

Yes. A circle is defined as the set of all points in a plane equidistant from a given point (the center of the circle) - hence - all points of a circle must be co-planar by definition.


What is the term for point that lie in the same plane?

co-planar


What is a coplanar?

Co-planar means being in the same plane.


What is it called when a point lies in the same plane?

co-planar


Give coordinates of four points that are vertices of a rectangle?

In Cartesian co-ordinates, the points (0,0), (4,0), (4,4) and (0,4) are an example of the four vertices of a rectangle.


Are parallel lines in space coplanar?

Parallel lines will be co-planar.


What will be the definition of co-linear force and coplanar force?

The difference is that one is co-linear force is one dimensional and co-planar force is 2-dimensional. Co-linear force is the force which is acting along a single line, whereas co-planar force is the force which is acting along a single plane.