б) 81

                                                                                                                   б) 2

                                                                                                                   г) 4

                                                                                                                   б) 4, 6, 16

                                                                                                                    г) 6, 16, 4

                                                                                                                   б) 23

                                                                                                                   г) 13

                                                                                                                   б) 4

                                                                                                                   г) 3

                                                                                                            б) 4

Завдання:

80-метровий кабель звисає з двох жердин, обидва висотою в 50 м.

а) 40                                                                               б) 10

в) 0                                                                                  г) 50

Ключ до тесту

1.    в (5 балів)

2.    в (5 балів)

3.    а (5 балів)

4.    в (5 балів)

5.    г (5 балів)

6.    г (5 балів)

7.    г (5 балів)

8.    а (5 балів)

9.    б (5 балів)

10.  в (5 балів)