HOC24
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ai kết bạn với mình thì mình k cho
600 số chắc chắn 10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000%
70 0 30 0 x o y z Ta có : góc xoz = 30 0 ; góc xoy = 70 0 => góc zoy = góc xoy - góc xoz => góc zoy = 70 0 - 30 0 = 40 0
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