Try to determine on which plane each of these visible objects is located.
![Fence with DANGER sign, flat bed of truck, London-style red sightseeing bus, arm reading HEAVY LIFT, concrete wall, house](https://fawny.org/blog/images/HeavyLift.jpg)
Try to determine on which plane each of these visible objects is located.
The foregoing posting appeared on Joe Clark’s personal Weblog on 2006.09.09 14:05. This presentation was designed for printing and omits components that make sense only onscreen. https://blog.fawny.org/2006/09/09/heavylift/