If it is 11: 15 a. m. at teens high school, then a bell will ring. which of these is true? a. if a bell is not ringing, then it must not be 11: 15. b. if a bell is ringing, then it is 11: 15. c. if it is not 11: 15, then a bell will not ring. d. if a bell is ringing, then it is not 11: 15. e. if a bell is not ringing, then it is 11: 15.

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.