Question

question 1 of 10 four points are always coplanar if: check all that apply. a. they are collinear. b. they lie on different planes. c. they lie on different lines. d. they lie in the same plane.

Explanation:

Collinear points (points on the same line) always lie on the same plane, so they are coplanar. Points that lie in the same plane are by definition coplanar. Points that lie on different planes are not coplanar. Points lying on different lines may or may not be coplanar.

Answer:

A. they are collinear.
D. they lie in the same plane.