1. The problem is to determine if line segments CD and EF are coplanar. 2. Two line segments are coplanar if they lie on the same plane. 3. Even if CD and EF intersect at point G, they can still lie on different planes. 4. Sharing a single point (G) does not guarantee that the two segments are coplanar. 5. Since CD and EF lie on different cards (planes), they are not coplanar. 6. Therefore, the answer is No, CD and EF are not coplanar.