Besar Sudut Penyiku = 90°
90° = 3x + x
90° = 4x
x = 90° ÷ 4
x = 22,5°
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Besar Sudut Penyiku = 90°
90° = 3x + x
90° = 4x
x = 90° ÷ 4
x = 22,5°