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5

Using only a pair of compasses and a ruler, construct the perpendicular line to PQ
passing through point N.

P
N
Q

2 Referring to the
construction of a
perpendicular line in
1 Example 5, what is the

P R 1 relationship between the
N construction methods of
S Q a perpendicular line and
3 a perpendicular bisector?
Discuss and explain.
2 CHAPTER

8

1 With the same distance 2 Widen the compasses to a distance 3 Draw a line joining
on the compasses, more than NR or NS, and with the N and the points of
construct two arcs from N same distance from R and from S on intersection of the arcs
intersecting PQ. Label the the compasses, construct two arcs constructed in Step 2.
two points of intersection above and below PQ respectively
as R and S. so that the arcs intersect.

Scan the QR Code or visit https://youtu. Scan the QR Code or visit https://youtu.be/
be/FoxcZU8P7JA to watch the video of Kow8PWTwIRM to watch the video of the
the construction of a perpendicular construction of a perpendicular line to a straight
line to a straight line passing through a line using a set square. Hence, construct the
point on the straight line. Then, explain perpendicular line in Example 4 and Example 5
the rationale of the construction steps. by using only a set square and a ruler.

179
Lines and Angles

08 TB Math F1.indd 179 11/10/16 12:17 PM