How do you know that:
j
k
C
D
A
B
8
1
7
2
6
3
5
4
Segment AB + segment BC = segment AC?
Segment addition postulate
How do you know that:
j
k
C
D
A
B
8
1
7
Angle 1 + angle 8 = 180
Def linear pair
2
6
3
5
4
Write as a biconditional:
An octagon is a polygon with 8 sides.
A polygon is an octagon iff it has 8 sides.
How do you know that:
j
k
C
D
A
B
8
1
7
Angle 5 is supp to angle 6
Def linear pair
2
6
3
5
4
How do you know that:
j
k
C
D
A
B
8
Line j is // to line k?
given
1
7
2
6
3
5
4
O
D
R
I
Segment OR is congruent to __________.
Segment DI
How do you know that:
j
k
C
D
A
B
8
1
7
2
6
Angle 7 is congruent to angle 1
Vertical angle thm
3
5
4
List all pairs of:
j
k
C
D
A
B
8
SSE angles
1 & 4,
8&5
1
7
2
6
3
5
4
How do you know that:
j
k
C
D
A
B
8
1
7
2
6
Angle 4 is congruent to angle 6
Vertical angle thm
3
5
4
Give another name for:
j
k
C
D
A
B
Segment AB
Segment BA
8
1
7
2
6
3
5
4
Give another name for:
j
k
C
D
A
Ray AB
Ray AC
B
8
1
7
2
6
3
5
4
How do you know that:
j
k
C
D
A
B
8
1
7
2
6
3
5
Angle 8 is congruent to angle 4
// lines  Alt Ext angles are congruent
4
O
D
Angle D ____________ angle O.
Is supplementary to
R
I
Give another name for:
j
k
C
D
A
B
8
1
7
2
6
3
5
4
Angle DCA
Angle 8, angle DCB, angle ACD, and angle BCD
Write as a biconditional:
Congruent angles have the same measure.
2 angles are congruent iff they have the same
measure.
List all pairs of:
j
k
C
D
A
B
8
1
7
2
6
3
5
Corresponding angles
1&3
2&4
5&7
8&6
4
How do you know that:
j
k
C
D
A
B
8
1
7
2
6
3
5
4
Angle 8 is congruent to angle 6
// lines  Corresponding angles are congruent
List all pairs of:
j
k
C
D
A
B
8
Alt int angles
7&3
6&2
1
7
2
6
3
5
4
How do you know that:
j
k
C
D
A
B
8
1
7
2
6
Angle 8 is congruent to angle 2?
Vertical angle thm
3
5
4
Write as a biconditional:
A linear pair is formed by 2 angles that are
both adjacent and supplementary.
2 angles form a linear pair iff they are both
adjacent and supplementary.
O
D
Angle D ____________ angle R.
Is congruent to
R
I
List all pairs of:
j
k
C
D
A
B
8
SSI angles
7&6
3&2
1
7
2
6
3
5
4
List all pairs of:
j
k
C
D
A
B
8
1
7
2
6
3
5
vertical angles
1 & 7,
8 & 2,
6 & 4,
5&3
4
O
D
R
I
Segment DO is congruent to __________.
Segment IR