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Record your races with a typeracer account:

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Racer Ankit (ankitkumar6995@gmail.com)
Race Number 221
Date Sat, 4 Feb 2017 12:12:55
Speed 58 WPM Try to beat?
Accuracy 93.3%
Rank 1st place (out of 5)
Opponents gknyaga (3rd place) shasher (2nd place)

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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.
— (book) by David M Bourg (see stats)