1. Which problem-solving strategy is used in indirect proofs? A. guess and check B. draw a diagram C. working backward D. decision-making Hint 2. State the assumption that could be used to start an indirect proof of the statement If 2n < 6, then n < 3. A. n > 3 B. n < 3 C. n3 D. n = 3 Hint 3. State the assumption that could be used to start an indirect proof of the statement m1 + m2 = 180. A. m1 + m2 180 B. m1 and m2 are complementary. C. m1 and m2 are supplementary. D. m1 + m2 = 90 Hint 4. Which assumption would you make to start an indirect proof of the following statement? The majority of students surveyed preferred chocolate ice cream to vanilla ice cream. A. The number of students surveyed that preferred vanilla ice cream to chocolate ice cream was greater than 50%. B. The number of students surveyed that preferred chocolate ice cream to vanilla ice cream was greater than 25%. C. The number of students surveyed that preferred chocolate ice cream to vanilla ice cream was greater than 50%. D. The number of students surveyed that preferred vanilla ice cream to chocolate ice cream was greater than 25%. Hint 5. The type of reasoning that uses a number of examples to arrive at a conclusion is __________ . A. exemplary reasoning B. contradictory reasoning C. deductive reasoning D. inductive reasoning Hint