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Mathematics, 16.06.2021 14:00 nnnnnhamilton7572
Cho 2 đường thẳng xx' và yy' cắt nhau tại O. Tia Om nằm giữa 2 tia Ox' và Oy, tia Ot là phân giác góc xOy. Chứng minh rằng mOx' + mOy' + 2mOt = 360 độ
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Cho 2 đường thẳng xx' và yy' cắt nhau tại O. Tia Om nằm giữa 2 tia Ox' và Oy, tia Ot là phân giác gó...
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