jika R=9 cm
r= 4 cM
PGSPL = 12 cm
bagaimana cara menentukan jarak kedua pusat lingkaran ?
MOHON BANTUANNYA
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AB² = (r1 - r2 )² + EB²
AB² = ( 9 - 4) ² + 12²
AB² = 25+ 144
AB² = 169
AB = √169
AB = 13 CM