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CHAPTER 3. GEOMETRY
174. i = ~ + O Ä =
=
175. p = ~Ü = Ä O ëáå α =
O O
=
=
=
3.3 Equilateral Triangle
=
páÇÉ=çÑ=~=Éèìáä~íÉê~ä=íêá~åÖäÉW=~=
^äíáíìÇÉW=Ü=
o~Çáìë=çÑ=ÅáêÅìãëÅêáÄÉÇ=ÅáêÅäÉW=o=
o~Çáìë=çÑ=áåëÅêáÄÉÇ=ÅáêÅäÉW=ê=
mÉêáãÉíÉêW=i=
^êÉ~W=p=
=
=
=
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Figure 12.
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176. Ü = ~ P =
O
=
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