Geometry

1. Geometry Unit II 3.3 Part 2 Partial Proofs Involving Parallel Lines

2. given postulate Theorem definition Linear pairs A ray that divides an angle into two adjacent angles that Are congruent. Two angles whose measures add up to 180 degrees

3. Two parallel lines The pairs of corresponding angles are congruent Their sum = 180 degrees Replacing one quantity with an equivalent one. They are congruent The pairs Of alternate interior angles are congruent The pairs Of alternative exterior angles are congruent The pairs Of same-side interior angles are supplementary.

4. a II c, b II d Given 2. Are corresponding angle Def. of corrs. Angles _______ CAP 4. _____ Def alt. ext angles Alternative Exterior Angles 5. ________ AEAT 6. _________ Substitution

5. 1. a II c, b II d Given 2. Are same side interior angles Def. same side INT Angle 3. Are supplementary SSIAT 4. Def. of supplementary angles 5. Are Alt. ext. angles Def. of Alt. Ext. Angles 6. AEAT 7. Substitution 8. Are supplementary Def. of supplementary

6. A E B 1. BE II LD, BE bisects angle ABD Given 2. Def of Ang. Bisector L 3. Are Alt. Int. Angle Def. Alt. Int D 4. AIAT 5. Substitution