Parthenon
Athens
Dallas City Hall
I.M. Pei
Havasu Falls
I.M. Pei
Parallel Lines and Planes
Lesson 3.3 Proving Lines
//
Which lines (if any) are parallel? State
the postulate or theorem that justifies
your answer.
K
118
64
62
D
E
C
Which lines (if any) are parallel? State
the postulate or theorem that justifies
your answer.
W
50
O
30
X
Y
52
I
28
Z
Which lines (if any) are parallel? State
the postulate or theorem that justifies
your answer.
L
A
46
44
46
90
T
S
Which lines (if any) are parallel? State
the postulate or theorem that justifies
your answer.
G
A
48
44
90
E
48
M
AIA
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
m 1 m  8
6
5
1
AIA
L
7
2
8
3
4
R
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
2  7
6
5
1
AIA
L
7
2
8
3
4
R
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
5  3
6
5
1
None
L
7
2
8
3
4
R
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
m 5  m  4
6
5
1
AIA
L
7
2
8
3
4
R
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
6
5
7
8
None
1
2
L
m 5  m 6  m 3 m  4
3
4
R
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
6
5
7
8
m  APL  m  PAR  180
1
L
SSI
2
3
4
R
In each exercise some information is given. Use3 this
information to name segments that must be parallel.
If there are not segements, say so.
A
P
6
5
7
8
SSI
1
2
3
L
m 1 m  2  m  5  m  6 180
4
R
C’est fini.
Good day and good luck.