1. Homework
Pg107(2,6,10,12-15,25-28,30-32,49)

2. 2.5 Algebraic Proof

3. Properties of Equality
Addition if 5 = 5 then = 5 + 2
Subtraction if 5 = 5 then 5 – 2 = 5 – 2
Multiplication if 4 = 4 then (3)(4) = (3)(4)
Division if 3 = 3 then (3/2) = (3/2)
Reflexive = 3
Symmetric if a = b then b = a
Transitive if a = b and b = c then a = c
Substitution if a = b then b can be substituted into any equation for a

4. Solving an equation 5x + 3 = 18 3x + 2 = 2x – 7
If a = 3 and b = 6 find c
3a + c = 2b

5. Properties of congruence
Congruence means pieces of equal size or shape
Equality means the same value
Reflexive
Symmetric
Transitive

6. Tell the property of congruence