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16x = 180 + 3 - 5 -2
16x = 176
x = 176/16
x = 11
A = 7x-3 = 7.11-3 =74°
B = 5x+5 = 5.11+5 = 60°
C = 4x+2 = 4.11+2 = 46°
coba digambar
2 sudut yg terbesar garis yg diapit merupakan garis terpendek
AB, AC, BC