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2. Copy each of the following diagrams and label the transversal as AB. Then draw
another transversal and label the line as PQ.
(a) (b) (c)

3. For each of the following diagrams, determine if the line labelled as PQ is a
transversal or not, and make justification.
(a) P (b) (c) P
P
Q

Q Q

What are corresponding angles, alternate angles LEARNING
and interior angles? STANDARDS
Recognise, explain and
5 Flip draw corresponding
angles, alternate angles
Classroom
and interior angles. CHAPTER
Aim: To explore angles related to parallel lines.
Instruction: • Explore by yourself before the lesson begins and discuss in groups
of four during the lesson. 8
• Open the folder downloaded from page vii.

1. Open the file Angles parallel lines.ggb using GeoGebra.
2. Click and drag the points on the screen displayed
and identify the parallel lines and the transversal.
3. Select ‘Show corresponding angles 1’ and ‘Show
corresponding angles 2’ to explore the properties of
corresponding angles.
4. Click at ‘Show sizes of angles’ and drag the points on
the screen displayed if necessary.

5. State another pair of corresponding angles.
6. Discuss with your friends and explain the properties of corresponding angles.
7. Select ‘Show alternate angles’ and ‘Show interior angles’ and continue exploring
alternate angles and interior angles.
8. State another pair of alternate angles and another pair of interior angles.
9. Discuss with your friends and explain the properties of alternate angles and
interior angles.
10. State the conclusions that can be made from your explorations.

189
Lines and Angles

08 TB Math F1.indd 189 11/10/16 12:17 PM