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  • 24-04-2024
  • Mathematics
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4. Panjang jari-jari dua lingkaran masing-masing 20 cm dan 10 cm. Jika jarak kedua pusat lingkaran 78 cm, maka panjang garis singgung persekutuan dalam kedua lingkaran adalah a. 58 cm b. 68 cm c. 72 cm d. 76 cm

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