In Euclidean plane geometry every triangle MUST BE coplanar.
Chat with our AI personalities
No. A trinagle does not require four points, three are sufficient. And any three points, if they are not colinear, must be coplanar.
They lie in the same plane, but they don't necessarily have to lie on the same line. Every triangle consists of three points that are coplanar but non-colinear.
a triangle
Coplanar :The vectors are in the same plane.Non coplanar :The vectors are not in the same plane.
because coplanar is coplanar and collinear is collinear!!