August 2018 1 10 Report
Luas segitiga ABC = 6 cm^2 , sedangkan panjang jari-jari lingkaran dalamnya 1 cm.
Panjang AB = 3 cm dan BC = 4 cm. 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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