Geometry

Question Analysis

This question involves the concept of parallel planes within the context of a 3D figure. The main focus is on applying the definition of parallel planes to identify the pair of parallel planes in the given triangular prism.

Key Concept Explanation:

Parallel planes are defined as planes that do not intersect each other, regardless of how far they are extended. In contrast, intersecting planes meet at a line.

Option Analysis

The parallel planes are ABC and DEF. In a triangular prism, the two bases are parallel to each other. Plane ABC and plane DEF are the two bases of the triangular prism. They do not intersect, which satisfies the definition of parallel planes.

The other options are incorrect:

Option A: Plane ACD and plane BFE share a common edge CE. They are not parallel since they intersect along this edge.

Option B: Plane ABD and plane DEF share a common edge DF. They are not parallel since...