CHAPTER 7. ANALYTIC GEOMETRY

7.12 Sphere

=

o~Çáìë=çÑ=~=ëéÜÉêÉW=o=

mçáåí=ÅççêÇáå~íÉëW=ñI=óI=òI=ñI=N óI=N òI=£=N

`ÉåíÉê=çÑ=~=ëéÜÉêÉW=(~IÄIÅ)=

oÉ~ä=åìãÄÉêëW=^I=aI=bI=cI=j=

=

=

718. 
     

     bèì~íáçå=çÑ=~=péÜÉêÉ=`ÉåíÉêÉÇ=~í=íÜÉ=lêáÖáå=Epí~åÇ~êÇ=
     cçêãF=
     ñO+óO+òO=oO=

     
     

====== =

=

Figure 151.

=

719. bèì~íáçå=çÑ=~=áêÅäÉ=ÉåíÉêÉÇ=~í=^åó=mçáåí=(~IÄIÅ)

()()ñ−~O+ ó−ÄO+(ò−Å)O=oO

720. aá~ãÉíÉê=cçêã
     ()()ñ−ñN ñ−ñO +(ó−óN)(ó−óO)+(ò−òN)(ò−òO)=MI==