In Euclidean plane geometry every triangle MUST BE coplanar.
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!!
Yes, of course, two line segments can be coplanar: Think of the sides of a plane triangle.
No. A trinagle does not require four points, three are sufficient. And any three points, if they are not colinear, must be coplanar.
If at least two of the three lines are parallel, the three lines will not form a triangle.
It is a plane figure, for example, a semicircle, a triangle, a kite.
No. For example, consider the vertices of a tetrahedron (triangle-based pyramid).
They are coplanar. ANY 2 lines would be coplanar, however a third line can be outside of the plane. just like 3 points will designate a plane and a triangle
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.
Coplanar :The vectors are in the same plane.Non coplanar :The vectors are not in the same plane.
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!!
Points that are coplanar are on the same plane.