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2495567900722701
2 năm trước
cho 2 tia oy,oz cùng thuộc 1 nửa mp có bờ chưa tia ox sao cho số đo góc xoy=30o và số đo góc xoz=120o a)yoz? b)vẽ om sao cho số đo góc xom=60o.phải có điều kiện gì để om là tia pg của góc xoz?tại soa? làm nhanh e sẽ cho ctlhn+cảm ơn+5*(nma phải đúng ạ)
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