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linhkarry21
2 năm trước
ai làm đc mn vote 5 sao ai vẽ hình mn vote hay nhất 8.cho góc xOy=60 độ.tia Oz là tia phân giác của góc xOy a)tính góc yOz và góc xOz ? b)trên tia Oz lấy A sao cho OA=4cm. Vẽ tia Am sao cho góc OAm=120 độ và tia Am cắt Ox tại B. Vẽ tia At sao cho góc OAt=120 độ và At cắt Oy tại C .đo đoạn AB,AC và so sánh độ dài c) đo đoạn OB,OC và so sánh độ dài d)đo góc ABO, góc ACO và cho biết số đo ? e) đọc tên các tam giác trên hình vẽ
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