Question

HELP PLEASE! Four points are always coplanar if: Check all that apply. A. they lie in the

same plane. B. three of them are coplanar. C. all of them are collinear. D. they
are not in the same plane.

Answer 1

Answer: The correct answer is A. they lie in the same plane.

Explanation:

If four points are coplanar, it means they all lie in the same plane. This is because a plane is defined as a two-dimensional flat surface that extends infinitely in all directions, and any four non-collinear points uniquely define a plane.

Option B is not correct because three points being coplanar does not necessarily imply that a fourth point will also be coplanar with them.

Option C is not correct because collinear points lie on the same straight line, not on the same plane.

Option D is not correct because if points are not in the same plane, they are not coplanar.