1. Agenda EQ: How do we write 2-column Geometric Proofs? Agenda
Warm Up/Check Hwk
Practice on Geometric Proofs
Quiz on Algebraic Proofs
Homework
Proofs Worksheets # 3 & 4 (1 & 3 from each)

2. Warm UP Write/Draw an example of each of the following:
Angle Addition Postulate
Definition of Vertical Angles
Substitution Property of Equality
Distributive Property of Equality
Segment Addition Postulate

3. Homework: Proofs Worksheet #1
Write a 2-column proof for the following:
Given: 2 𝑛+5 =−2 Prove: 𝑛=−6 (#8 f/ S.E.W.)
Given: 𝑣+9 3 =8 Prove: 𝑣=15 (#7 f/ S.E.W.)
Statement
Reason
Statement
Reason
Statements
Reasons
1 and 3 are a linear pair.
2 and 3 are a linear pair. 1.
2. 1 and 3 are a supplementary angles.
2 and 3 are a supplementary angles. 2.
3. 1  2 3.
4. m1 = m2 4.

5. Proofs Worksheet #2