Answer
1, Given
2. Definition of a straight angle
3. Angle Addition Postulate
4. Substitution Property of Equality
5. Given
6. Definition of a right angle
7. Substitution Property of Equality
8. Subtraction Property of Equality
9. Angle Addition Postulate
10. Substitution Property of Equality
11. Definition of complimentary angles
Work Step by Step
Use the definitions, properties, and postulates to prove each given statement.