Question

In Exercises 5-11 you will have to visualize certain lines and planes not shown in the diagram of the box. When you name a plane, name it by using four points, no three of which are collinear.

Name the intersection of plane DCFE and plane ABCD.

Short answer

The intersection of plane DCFE and plane ABCD is line CD.

Step-by-step solution

Step 1. Observe the given diagram.

The given diagram is:

Step 2. Observe the figure shown.

Highlight the planes DCFE and ABCD.

Step 3. Name the intersection of the planes DCFE and ABCD.

From the above figure, it can be noticed that the planes DCFE and ABCD are intersecting on line CD.

Therefore, the intersection of the planes DCFE and ABCD is line CD.