80. Rochester, New York (43.2°N, 77.6°W). and Richmond. Virginia (37.5°N, 77.5°W), have approximately the same
longitude, which means that they are roughly due north-
south of each other. Use the difference in latitude to
approximate the distance between the cities.

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two

answer: the proof is mentioned below.

step-by-step explanation:

since, given:   lines bc = ef

prove:   lines ac > ef

          statements                                           reason

1. bc=ef                                           1. given

2. ac= ab+bc                                 2. because b is the point between the  

                                                            line segment ac

3.   ac > bc                                       3. because if a line segment is equal to

                                                          the sum of two line segments then it is

                                                          always greater then each of these

                                                          individual line segments

4. ac > ef                                         4. by equality property.