Ken and Betty each write a proof of the statement: If , then . Four rays A, B, C, and D originate from point O. What two statements describe how Ken and Betty proved ? Ken's Proof Statements Reasons 1. 1. given 2. 2. angle addition postulate 3. 3. subtraction property of equality Betty's Proof Statements Reasons 1. 1. assumption 2. 2. addition property of equality 3. 3. angle addition postulate 4. 4. given 5. 5. by contradiction Ken wrote an indirect proof using deductive evidence. Betty wrote an indirect proof using deductive evidence. Betty wrote a direct proof using contradiction. Betty wrote an indirect proof using contradiction. Ken wrote a direct proof using deductive evidence. Ken wrote a direct proof using contradiction. Reset Next