1917: Lenin, Wilson, and the Birth of the New World Disorder

1917: Lenin, Wilson, and the Birth of the New World Disorder

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PEMBAHASAN

Sudut lurus = 180°

a + 128° = 180°

a = 180° - 128°

a = 52°

Sudut segitiga = 180°

72° + b + 52° = 180°

124° + b = 180°

b = 180° - 124°

b = 56°

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