1. Quarterly Review!!

2. Fill in the Blank Proof! Given: Picture to the left Prove: x = 40
Statements
Reasons
<CDE and <EDF are supplementary
Linear Pair’s are supplementary
<CDE + <EDF = 180
Definition of supplementary
x + (3x + 20) = 180 1)
4x + 20 = 180 2)
4x = 160 3)
X = 40 4)

3. Fill in the Blank Proof! Given: XY = 42 Prove: n = 5
Statements
Reasons
XZ + ZY = XY
Segment Addition Postulate
XY = 42 1)
3(n+4) + 3n = 42
Substitution
3n n = 42 2) 3)
Combine Like terms
6n = 30 4)
N = 5
Division

4. Find the value of each missing angle!

5. Find the missing Exterior Angle

6. Challenge Triangle Problems!

7. Write the Converse and Biconditional if possible.
If a polygon is a rectangle, then it has four sides.
If three points are on the same line, then they are collinear
If a line is a bisector, then it divides a segment into two congruent parts.