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8.3 Open the folder downloaded from page vii for extra
questions of Mastery Q 8.3.
1. In the diagram, PQR and UTS are straight lines. U T S
Find the values of x and y. x y

135° 42°
P Q R

2. In the diagram, PQRS is a straight line. Find the U T
values of x and y. x 52° y

74° 110°
P Q R S

3. In the diagram, QRST is a straight line. Find the T
values of x and y. U 25° x S
y
125° R
P Q

4. The diagram shows a hexagonal wooden frame CHAPTER
PQRSTU resting on a horizontal ground.
(a) State the angle of elevation of Q from O.
(b) State the angle of depression of T from O. 8

5. In the diagram, VUTS and PQR are straight lines. V U T S
(a) Find the values of x and y. 40° y
(b) Find the reflex angle QWU. W 62°
(c) Assuming VUTS is a horizontal line, find the
angle of depression of R from T. 70° x
P Q R

6. The diagram shows the positions of Kamal,
Cindy, Adila and David in two condominiums.
The angle of elevation of Cindy from David is Kamal
15°, the angle of elevation of Adila from Cindy
is 18° and the angle of depression of Adila from
Kamal is 40°. Find the values of x and y. y Adila
Cindy x
David

195
Lines and Angles

08 TB Math F1.indd 195 11/10/16 12:17 PM