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nb= 4 cm = r
mn= 15 cm = P
Dit : d=......?
Jawab :
d =√P²-(R+r)²
d =√15²-(5+4)²
d =√225-9²
d =√225-81
d =√144
d = 12 cm
Nomor 1 nya saja. Maaf kalau salah