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j=17 cm
l=15 cm
r1=11 cm
r2.. .??
jawab
l=√j²-(r1-r2)²
15²=17²-(11-r2)²
225=289-(11-r2)²
(11-r2)²=289-225
(11-r2)=√64
(11-r2)=8
11-8=r2
3=r2
jadi jari jari lingkaran yang lainnya 3 cm