Jawaban:
sudut segitiga: 180°
sudut BCA :180° - (42 + (180-112)
180° - (42+68)
180° - 110
70°
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Jawaban:
sudut segitiga: 180°
sudut BCA :180° - (42 + (180-112)
180° - (42+68)
180° - 110
70°