Text race history for disgusting butterfly (swallowtail)

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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.

Game Time WPM Accuracy
787 2020-07-15 09:17:38 95.95 98%