Penjelasan dengan langkah-langkah:
∠ACB = 90° (sudut kelliling menghadap diameter)
∠ABC = 2 ∠CAB
misal ∠ CAB = x
maka ∠ ABC = 2x
∠ACB + ∠ABC + ∠CAB = 180°
90° + 2x + x = 180°
3x = 180° - 90°
3x = 90°
x = 90°/3
x = 30°
∠ABC = 2x
∠ABC = 2(30°)
∠ABC = 60°
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Verified answer
Penjelasan dengan langkah-langkah:
∠ACB = 90° (sudut kelliling menghadap diameter)
∠ABC = 2 ∠CAB
misal ∠ CAB = x
maka ∠ ABC = 2x
∠ACB + ∠ABC + ∠CAB = 180°
90° + 2x + x = 180°
3x = 180° - 90°
3x = 90°
x = 90°/3
x = 30°
∠ABC = 2x
∠ABC = 2(30°)
∠ABC = 60°