Mathematics, 16.07.2021 23:10 trinityhayes347

Cho góc xOy là góc tù, bên ngoài gó đó dựng tai Oz vuông góc với tia Ox và tia Ot vuông gics với tia Oy. Chứng tỏ rằng:xOy+zOt=180°

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Cho góc xOy là góc tù, bên ngoài gó đó dựng tai Oz vuông góc với tia Ox và tia Ot vuông gics với tia...

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