B 

                                                                                                       d1

                                                                                      A                            d

                                                                                                  d2

                                                                               C                           

Spadek

                                                                                  B

                                                                   h

                                                                        a

                                             A

                                                                                    d

i = tga = h / d               °/°, °/°°

0,01 = 1 °/°              (przez 100 )

0,001 = 1 °/°° (przez 1000 )