Jawabanmu

2014-05-27T16:56:45+07:00
R = 25 - 17 = 8
j²= 15² + 8²
j²= 225 + 64
j=√289=17 cm
2014-05-27T17:00:51+07:00
Pake phytagoras, jd ST = sisi tinggi, SD = sisi datar, SM = sisi miring
SM^2 = SD^2 +ST^2
x^2 = (25-17)^2 + 15^2
x^2 = 64 + 225
x^2 = 289
x = 17 cm --> jarak pusat kedua lingkaran,
yg pasti klo salah minta maap yaa