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Originally Posted by harmonygirl is this in 3 dimensional space? |
No. It is in a 4 dimensional curvilinear space and time.
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Originally Posted by Guille What is the meaning of the area? Could it be the field in which the force acts now that it's not orthogonal? |
No triangles no areas and no areas no volumes. But if triangles exist then inequalities exist. However, equalities exist only if there is no areas and only primary forces exist. Secondary forces can exist only in inequalities.
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Originally Posted by mkirkpatrick but is not the drawing one of straight lines? |
Yes. They are straight lines in the strictest sense. However, 90 degrees lines exist only with respect to one straight line not two or more straight lines.