The delivery person stopped on the 14th floor to talk to a friend.
before stopping, he had just made a delivery 4 floors above.
before that he made a delivery 6 floors below. before that he had
made a delivery 9 floors above. before that he had made a delivery
15 floors below. on what floor did he make his first delivery?

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.