∠BCA = 70°
Penjelasan dengan langkah-langkah:
∠ABC = 180° - ∠CBD
∠ABC = 180° - 112°
∠ABC = 68°
∠BCA = 180° - (∠BAC + ∠ABC)
∠BCA = 180° - (42° + 68°)
∠BCA = 180° - 110
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∠BCA = 70°
Penjelasan dengan langkah-langkah:
∠ABC = 180° - ∠CBD
∠ABC = 180° - 112°
∠ABC = 68°
∠BCA = 180° - (∠BAC + ∠ABC)
∠BCA = 180° - (42° + 68°)
∠BCA = 180° - 110
∠BCA = 70°