CHAPTER 3. GEOMETRY
174. i = ~ + OÄ =
= 175. p =
O
~Ü Ä = 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= = =
=
= Figure 12.
= 176. Ü =
~ P = O =
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