CHAPTER 3. GEOMETRY
ïÜÉêÉ=
O
i
é= K==
=
=
=
3.19 Circle
=
o~ÇáìëW=o=
aá~ãÉíÉêW=Ç=
`ÜçêÇW=~=
pÉÅ~åí=ëÉÖãÉåíëW=ÉI=Ñ=
q~åÖÉåí=ëÉÖãÉåíW=Ö=
`Éåíê~ä=~åÖäÉW=α=
fåëÅêáÄÉÇ=~åÖäÉW=β=
mÉêáãÉíÉêW=i=
^êÉ~W=p=
=
=
- O
~ Ooëáå
α
= =
=
=
=
Figure 30.
=