Students in a Spanish club visited several countries over summer vacation. Eleven traveled to Spain, while 19 visited Costa Rica and 24 traveled to Mexico. Five students visited Costa Rica and Spain while 6 students traveled
to Costa Rica and Mexico. Eight students went to both Spain and Mexico, and 4 students went to all three
countries. If there were 47 students in the Spanish club, how many didn't go to any of the three countries?

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.