October 2018 2 44 Report
TOLONG bantuannya :)
diketahui panjang jari-jari dua buah lingkaran masing-masing 7 cm dan 5cm jarak kedua pusat lingkaran 20 cm. hitunglah:
a. panjang garis singgung persekutuan dalam?
b. panjang garis singgung persekutuan luar?

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