It's no secret that all measuring and optical devices are mounted on stands (tripods), with only 3 feet (theodolite, telescope, camera, laser level etc.).
Just War, tourism and fishing equipment, in most cases carried out on three legs.
The fact that this situation supports provides guaranteed full resistance.
If you've ever paid attention, then not a single object, which has three points of support - has no backlash (no reeling), as opposed to 4 or more poles.
Three points define a single plane!
A (x; y; z) + B (x; y; z) + C (x; y; z) + D = 0 - a plane equation in Cartesian coordinates from the three-dimensional space geometry course. And this means that wherever three arbitrary points in three-dimensional space (the points with any coordinates) were located, they will always determine (set) a single plane.
The exception to this rule or a special case is a situation where 3 points are located on the same line.
So who of manufacturers agree to assembly-line production of tripods where the legs are arranged in a row? )))
It is also important that the supporting part of the tripod is still where the angle at which to stand - in the plains, rocky terrain or in the desert. When the three pillars will always provide the best stability!
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