2. MECHANICS
The group that will win in a toss coin will
have the right to choose one representative from
the other group to be the opponent of their
chosen representative. Then, I will ask a question.
The first one who can write the answer on the
board earns a point. She/ he will have the right to
choose the next opponent of their next
representative and so on.
3. Two lines are _________ if and
only if they are coplanar and do
not intersect.
10. π΄π΅ II πΆπ·
Two lines are parallel if and only if they are coplanar
and do not intersect.
πΈπΉ intersects π΄π΅ and πΆπ·
πΈπΉ Transversal is a line that intersects two or more
lines at different points
1 2
3 4
5 6
7 8
11. Transversal is a line that intersects two or more
lines at different points
Parallel
lines
transversal
Non-Parallel
lines
transversal
12.
13. ALTERNATE INTERIOR/EXTERIOR ANGLES
Alternate Interior Angles: Two angles that lie between
parallel lines on opposite sides of the transversal (but not a
linear pair).
Alternate Exterior Angles: Two angles that lie outside
parallel lines on opposite sides of the transversal.
ο 3 & ο 6, ο 4 & ο 5
ο 2 & ο 7, ο 1 & ο 8
1 2
3 4
5 6
7 8
Interior
Exterior
Exterior
14. SAME SIDE
INTERIOR/EXTERIOR ANGLES
1 2
3 4
5 6
7 8
Interior
Exterior
Exterior
Same side angles lies on the same side of the
transversal.
Same Side Interior Angles:
ο3 and ο5, ο4 and ο6
Same Side Exterior Angles:
ο1 and ο7,
ο2 and ο8
17. Group 1 Group 3
Prove: οπ β οπ Prove: οπ β οπ are
supplementary
Group2 Group 4
Prove: οπ β οπ Prove: οπ β οπ are
supplementary
18. If two parallel lines are cut by a transversal, then
alternate interior angles are congruent.
If two parallel lines are cut by a transversal, then
alternate exterior angles are congruent.
If two parallel lines are cut by a transversal, then
the interior angles on the same side of the
transversal are supplementary.
If two parallel lines are cut by a transversal, then
the exterior angles on the same side of the
transversal are supplementary.
19. Name the pairs of the following angles formed by a
transversal.
Line M
B
A
Line N
D E
P
Q
G
F
Line L
Line M
B
A
Line N
D E
P
Q
G
F
Line L
Line M
B
A
Line N
D E
P
Q
G
F
Line L
500
1300
21. EVALUATION
Find all the missing
angle measures,
and name the
postulate or
theorem that
gives us
permission to
make our
statements.
40Β°
120Β°
120Β°
60Β°
60Β°
40Β°
60Β°
60Β°
180-(40+60)= 80Β°
80Β°
80Β°
80Β°
100Β°
100Β°