Jawabanmu

Jawaban paling cerdas!
2014-06-14T07:57:54+07:00
Pgl = √j²-(r1-r2)²
      = √13²-(7-2)²
      = √169 - 25
      = √144
      =12 cm
2 5 2
2014-06-14T08:00:13+07:00
P^2 = L^2 - (R-r)^2 13^2 = L^2 - (7-2)^2 169 = L^2 - 5^2 L^2 = 169 - 25 L^2 = 144 L = 12