October 2018 2 217 Report
Dua buah lingkaran masing masing berjari jari 12 cm dan 7 cm.jarak titik pusat kedua lingkaran adalah 23 cm tentukan:
a. panjang garis singgung persekutuan luar(PGSPL)
b. panjang garis singgung persekutuan dalam(PGSPD)
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