Jawabanmu

Jawaban paling cerdas!
2014-04-13T21:42:02+07:00
L = garis singgung luar p= titik pusat kedua lingkaran r = jari2 l^2 = p^2 - (r1-r2)^2 * 12^2 = 13^2 - (r1-3,5)^2 * 144 = 169 - (r1-3,5)^2 * (r1-3,5)^2 = 169-144 * (r1-3,5)^2 = 25 * r1-3,5 = 5 * r1 = 8,5 cm
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