August 2018 2 63 Report
Luas Segitiga ABC =  6cm^{2} , sedangkan panjang jari-jari lingkaran dalamnya 1 cm, panjang AB = 3cm dan BC = 4cm. Panjang jari-jari lingkaran luarnya adalah
A. 2,5 cm
B. 5.5 cm
C. 6,5 cm
D. 8,6 cm
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