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-4x+28
x-32
x 32 derajat
12x-12 = 180
12x = 180+12
12x = 192
x = 192/12
x = 16
Pelurus sdt AOC adalah sdt BOC
4x+8 = 4.16 + 8
= 64+8
= 72⁰
45⁰ 18' 10" + 28⁰ 27' 30'' = 73⁰ 45' 40"