During a winter storm, the temperature on the top of a mountain changed an average of -2.5o C every hour for 12 hours. At noon the temperature was -5o C. During the same period, the temperature at the bottom of the mountain changed at 1/5 the rate of temperature change on the top of the mountain. What is the hourly rate of change at the bottom of the mountain?

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.