Which of these contexts describes a situation that is certain? Rolling a number less than or equal to 6 on a standard six-sided die, numbered from 1 to 6. Spinning a spinner divided into four equal-sized sections colored red/green/yellow/blue and landing on green or red or blue. Winning a raffle that sold a total of 100 tickets if you bought 50 tickets. Reaching into a bag full of 19 strawberry chews and 1 cherry chew without looking and pulling out a pineapple chew.

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.