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CHAPTER 3. GEOMETRY
~Ä ÅÜ
171. p = = =
O O
=
=
=
3.2 Isosceles Triangle
=
_~ëÉW=~=
iÉÖëW=Ä=
_~ëÉ=~åÖäÉW=β =
sÉêíÉñ=~åÖäÉW=α =
^äíáíìÇÉ=íç=íÜÉ=Ä~ëÉW=Ü=
mÉêáãÉíÉêW=i=
^êÉ~W=p=
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Figure 11.
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α
172. β = VM − =
°
O
=
~ O
173. Ü = Ä − =
O
O
Q
27
