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r2 =10
Jap = 50
garis singgung dalam
jari-jari dijumlahkan
R = r1 + r2
R = 20 + 10
R = 30
gsd =√jap^2 - R^2
gsd =√50^2 -30^2
gsd = √1600
gsf = 40
garis singgung luar
jaru2 di kurangi
R = r1 - r2
R = 20 - 10
R = 10
gsl = √jap^2 -R^2
gsl =√50!^2 -10^2
gsl = √2400
gsl = 20√6