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ditanya besar busur bcd
jawab karena sudut bad berhadapan dengan sudut bcd yang artinya kalau dijumlah 180° jadi jawabannya 180-75= c . 105°
360° - (75° + 75°)
360° - (150°)
210° ÷ 2 = 105° *C*
Kalau BAD = 70°
360° - (70° + 70°)
360° - (140°)
220° ÷ 2 = 110°