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Racer Lonely (ap053001)
Race Number 26
Date Sun, 16 Apr 2017 21:14:00 +0000
Speed 75 WPM Try to beat?
Accuracy 92.5%
Rank 2nd place (out of 3)
Opponents iamgod_77 (3rd place) shoujo (1st place)

Text typed:

In two dimensions we say that a rigid body has only one rotational degree of freedom, whereas in three dimensions we say that a rigid body has three rotational degrees of freedom. This might lead you to infer that in three dimensions you need to have three scalar quantities to represent a body's rotation. Indeed, this is the minimum requirement.
Physics for Game Developers (book) by David M Bourg (see stats)