1. Proving Statements About Angles
Chapter 2 Section 2.6-Part 1
Proving Statements About Angles

2. Warm-Up Find the measure of each angle. A right angle
The complement of 42°
The supplement of 42°
Two congruent angles that are complementary
Two congruent angles that are supplementary

3. Definitions

4. A
mA = 90° A
mA < 90° A is acute A
90° < mA < 180° A is obtuse

8. Use the diagram to decide whether the statement is true or false

9. Make sketch of the given information label all angles that can be determined
42°
42°

10. Make sketch of the given information label all angles that can be determined
90°
42°
138°
42°
138°

11. Solve for x

12. Solve for x

14. Write a Two Column Proof
Statements Reasons
1. 2  3
2. 1   4  3
3. 1  3
4. 1  4