Jawabanmu

2014-07-27T07:38:46+07:00
Persekutuan luar :
J =  \sqrt{ D^{2} +  (R-r)^{2} }

D =  \sqrt{ J^{2} -  (R-r)^{2} }

R-r=  \sqrt{ J^{2} -  D^{2} }

persekutuan dalam

J =  \sqrt{ D^{2} + (R+r)^{2} }

D =  \sqrt{ J^{2} -  (R-r)^{2} }

R+r=  \sqrt{ J^{2} -  D^{2} }