20
CT
pqoJabUUR==QJOPUJQUUJPN=ENF`q
60
30
A
B
A
B
60°
90°
20°
A
B
30°
B
C C
A
!"# $%&=EF
x !"#$%&=Epr_=tllcboF
• !"#$%&'()*+,vbp
• !"#$%&'()*+,-
kl !"#$%&'()*+,-.
!=icb=
• !"#$%&'(açäÄó=aáÖáí~ä
!"#$%&'()*+,-./
!"#$%&'( )
!"#$%&'()*+,-./
`rpqljfwb= !"jbkr=bum^ka
lk !"#$%&'()*+,-
QO=
x ! "#$%Eproo=mlpfKFG
!"#$%&'()(*+,-./
!"#$%&'()*+,-./0
• !"#"$%&'()=A= !
pfab
• !"#"$%&'()=B= !
jfaaib
• !"#"$%&'()=C= !
_befka
!"#$%&'()(*+,-."
kl !"#
x ! "#$=Eproo=ebfdeqFG
!"#=Eproo=_^`h=edqKFGG
!"#$%&'()*&'(+(,
!"#$%&'()*+,-./0
!"#$
• !"#"$%&'()=A= !
ilt
• !"#"$%&'()=B= !
efde
G !"#"$%&=EproolrkaF !
kl !"#$%&'(
GG !"#$#%&'(proo=_^`h
!kl !"#$%&'(
01CT05HUPAU.p65 3/20/02, 5:09 PM20