with activities

1. LovebellaC. Jao
DemoTeacher

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.

4. ___________ are two angles
whose measures have a sum of
180°.

5. ___________ are two
nonadjacent angles formed by
two intersecting lines.

6. A line that intersects two or
more lines at different points is
called _______.

7. These are pair of nonadjacent
exterior angles that are on opposite
sides of a transversal.

8. This property of real numbers
states that if a+b, b+c, then a+c.

10. 𝐴𝐵 II 𝐶𝐷
Two lines are parallel if and only if they are coplanar
and do not intersect.
𝐸𝐹 intersects 𝐴𝐵 and 𝐶𝐷
𝐸𝐹 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

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.
 3 &  6,  4 &  5
 2 &  7,  1 &  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:
3 and 5, 4 and 6
Same Side Exterior Angles:
1 and 7,
2 and 8

15. CORRESPONDING ANGLES
Corresponding Angles: Two angles that occupy
corresponding positions.
 2   6,  1   5,  3   7,  4   8
1 2
3 4
5 6
7 8

17. Group 1 Group 3
Prove: 𝟑 ≅ 𝟔 Prove: 𝟑 ≅ 𝟓 are
supplementary
Group2 Group 4
Prove: 𝟐 ≅ 𝟕 Prove: 𝟏 ≅ 𝟕 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
BA
Line N
D E
P
Q
G
F
Line L
Line M
BA
Line N
D E
P
Q
G
F
Line L
Line M
BA
Line N
D E
P
Q
G
F
Line L
500
1300

20. LET’S PRACTICE
m<1=120°
Find all the remaining
angle measures.
1
4
2
65
7 8
3
60°
60°
60°
60°
120°
120°
120°
120°

21. EVALUATION
Find all the missing
angle measures,
and name the
postulate or
theorem that
gives us
permission to
make our
statements.
40°
120°
120°
60°
60°
40°
60°
60°
180-(40+60)= 80°
80°
80°
80°
100°
100°

22. ASSIGNMENT
In the accompanying figure, 𝐵𝐴 II 𝐶𝐷
and 𝐷𝐸 II 𝐵𝐶. Find the value of x and 3x.