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Sehingga,
x = 1/3 (180-x)
Pindahkan 3 ke kiri
3x = 1(180-x)
3x = 180 - x
3x + x = 180
4x = 180
x = 180/4
x = 45°
maka pelurus x = 180 - x
Sehingga
x = (1/3)(180 - x)
⇒ 3x = 180 - x
⇒ 3x + x = 180
⇒ 4x = 180
⇒ x = 180/4
⇒ x = 45°
Jadi, besar sudut itu 45°
Terimakasih semoga membantu