Complete the proofs below by filling in the missing statements and reasons. 19. Given: 21 and 22 form a linear pair, 21 = 23 Prove: 22 and 23 are supplementary Statements Reasons 1. 21 and 22 form a linear pair 1. 2. 21 and 22 are supplementary 2. 3. m21+m2 = 180 4. 123 5. m21=mZ3 6. mZ3+m2 = 180 3. 4. 5. 6. 7. 22 and 23 are supplementary 7. 2 3