This document discusses different types of angles and their relationships when intersected by a transversal line. It defines a transversal as a line that intersects two or more parallel lines. It explains corresponding angles, alternate angles, and interior angles. It provides examples of how to identify these angles using shapes like F, Z, and U. The document concludes with exercises involving calculating unknown angle measures using properties of these angle relationships.

2. Friday, January 25, 2013
LINE AND ANGLES
 Transversal
 Corresponding Angles
 Alternate Angles
 Interior Angles
Mr.Airil Ahmad

3. Friday, January 25, 2013
TRANSVERSAL
 Transversal is a line that intersects two or
more parallel lines.
P
PQ is a transversal
line
Q
Mr.Airil Ahmad

4. Friday, January 25, 2013
OPPOSITE ANGLES
WHAT IS THE MEANING OF
OPPOSITE?
Mr.Airil Ahmad

5. Friday, January 25, 2013
CORRESPONDING ANGLES
 Corresponding angles can be identified by
the F-shape.
angle a = angle d
b
Find other 2 pairs
c a
i. Angle ___________ = Angle __________
ii. Angle ___________ = Angle __________
e
f d
Mr.Airil Ahmad

6. Friday, January 25, 2013
ALTERNATE ANGLES
 Alternate angles can be identified by the Z-
shape.
angle a = angle e
b
Find other pair
c a
i. Angle ____ = Angle ________
e g
f d
Mr.Airil Ahmad

7. Friday, January 25, 2013
INTERIOR ANGLES
 Interior angles can be identified by the U-
shape or П-shape.
angle a + angle g = 1800
b
c a Find other pair
i. Angle ____ + Angle ________ = 180
e g
f d
Mr.Airil Ahmad

8. Friday, January 25, 2013
EXERCISE
630
1. x0 2. 3.
x0
1200 980 x0
4. 5. 6.
470
x0
1290 x0 340 760
x0
Mr.Airil Ahmad

9. Friday, January 25, 2013
EXERCISE
7.
370
37 0
x0
44 0
440
X0 = 370 + 440
X0 = 810 Mr.Airil Ahmad

10. Friday, January 25, 2013
EXERCISE
8. 420 9. 550 10. 380
860 x0 283 0
x0 490 x0
11. 1250 12. 1220 13. 1200
x0 1050 x0
1650 x0 1300
Mr.Airil Ahmad

11. Friday, January 25, 2013
EXERCISE
141 135 140
14. 15. 16.
x0 100
270
35 x0 x0
x
17. x0 18.
70 110
30
75
Mr.Airil Ahmad

12. Friday, January 25, 2013
EXERCISE
 Page 9 , Exercise 1.1D No. 3
 Page 11, Exercise Subjective
Questions No. 2
Mr.Airil Ahmad

13. Friday, January 25, 2013
Mr.Airil Ahmad