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2.1 Basics of Structures


                 Indices of directions in space








                                                                              “[110]”

                                                             Procedure in three steps





                                c










                                                   b




                      a



                       1. Select 000                       2. Mark position of second point                                3. Draw vector






                                          Convention: right-handed coordinate system

                                          • middle finger: a

                                          • forefinger: b
                                          • thumb: c
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