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x=360-230=130
jd sudut2nya
90...90...50...130
b.sudut di samping sudut 70=180-70=110
sudut disamping 135=
180-135=45
jd sudut2nya=
135..70..110..45
c.sudut dibawah 110=
180-110=70
sudut diatas 60=
180-60=120
jd sudut2nya=
120..110..60..70