T?t C?Th? D?c L?p tenth? D?c L?p 11Th? D?c L?p 12Th? D?c L?p sixth? D?c L?p 7Th? D?c L?p 8Th? D?c L?p 9+ D?ng toán 2.two Vi?t ph??ng trình ???ng th?ng ?i qua m?t ?i?m vuông góc ho?c track song v?i ???ng th?ng cho tr??c.T?t C?Th? D?c L?p tenth? D?c L?p 11Th? D?c L?p 12Th? D?c L?p 6Th? D?c L?p 7Th? D?c L?p 8Th? D?c L?p nineT?t C?Th? D?c L?p 10Th?