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Verified answer
LingkaranJika terdapat segiempat yg dibentuk oleh 4 tali busur pada lingkaran, jumlah besar sudut yg berhadapan adalah 180°.
<ABC + <CDA = 180°
4X + 10 + 70 = 180
4X + 80 = 180
4X = 180-80
4X = 100
X = 100/4
X = 25°
Jadi, nilai X adalah 25° (B).
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Verified answer
Jawabsudut ABC + sudut CDA = 180°
4x + 10° + 70° = 180°
4x + 80° = 180°
4x = 180° - 80°
4x = 100°
x = 100° / 4
x = 25°
jawaban (B)
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