Penjelasan dengan langkah-langkah:
x + 15° + x + 30° + x = 180°
3x + 45° = 180°
3x = 180° - 45°
x = 135° : 3
x = 45°
Sudut A
= x + 15°
= 45° + 15°
= 60°
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Penjelasan dengan langkah-langkah:
x + 15° + x + 30° + x = 180°
3x + 45° = 180°
3x = 180° - 45°
x = 135° : 3
x = 45°
Sudut A
= x + 15°
= 45° + 15°
= 60°