CHAPTER 9. GEOMETRY 9.2
O
P
Q
R
S
d
c
O
P
Q
R
S
g
P
R
33 ◦
b
a
O
P
Q
R
S
e
h+50◦
3 h
34 ◦
m
O
Q
S
8 ◦
f
O
Q
S
17 ◦
52 ◦
k
O
Q
S
19 ◦
l
O
Q
S
121 ◦
p
O
Q
S
1. 2.
3.
4.
5. 6.
7. 8.
R
S
P
4 h− 70 ◦
2 h− 20 ◦
R
R j i R R T
n
o
T
�
O
q
r
O
P
Q
R
S
d
c
O
P
Q
R
S
g
P
R
33 ◦
b
a
O
P
Q
R
S
e
h+50◦
3 h
34 ◦
m
O
Q
S
8 ◦
f
O
Q
S
17 ◦
52 ◦
k
O
Q
S
19 ◦
l
O
Q
S
121 ◦
p
O
Q
S
R
S
P
4 h− 70 ◦
2 h− 20 ◦
R
R j i R R T
n
o
T
�
O
q
r