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b 95
c 80
d 43
e 27
f. 14
sudut pelurus itu jumlahnya 180. jd tinggal dikuragin aja
b.180°-85°=95°
c.180°-100°=80°
d.180°-137°=43°
e.180°-153°=27°
f.180°-166°=14°
180° dari sudut pelurusnya