Bài 1 (rất khó) Cho \(xOy\) = \(30°\) .Vẽ \(yOz\) kề bù với \(xOy\) a, Tính số đo \(yOz\) b, Vẽ \(zOt\) =\(60°\) sao cho tia \(Ot\) nằm giữa hai tia \(Oz\) và \(Oy\) .Tính \(yOt\) và chứng minh \(Oy\) \(\perp\) \(Ot\)~giúp tớ với ~ không dễ đâu khó...
Đọc tiếp
Bài 1 (rất khó) Cho \(xOy\) = \(30°\) .Vẽ \(yOz\) kề bù với \(xOy\)
a, Tính số đo \(yOz\)
b, Vẽ \(zOt\) =\(60°\) sao cho tia \(Ot\) nằm giữa hai tia \(Oz\) và \(Oy\) .Tính \(yOt\) và chứng minh \(Oy\) \(\perp\) \(Ot\)
~giúp tớ với ~ không dễ đâu khó lắm
chú ý phải làm dài
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