cho ∆ABC có tia phân giác của góc B cắt AC tại M. Qua a kẻ đường thẳng song song với BM, đường thẳng này cắt đường thẳng BC tại N. Chứng minh rằng: góc BAN = góc BNA Giúp em vs ạ 5 sao cảm ơn ạ

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1. Because I am sick, I do not go out.  Because of …………………………………………… 2. Because the water is polluted, we can’t swim in that river.  Because of …………………………………………………………………………………… 3. Because Nga has had a sore leg, she had difficulty in walking.  Because of …………………………………………………………………………………… 4. Because he behaved badly, he found himself in trouble.  Because of …………………………………………………………………………………… 5. Because it was snowing, we didn’t go out for a walk.  Because of …………………………………………………………………………………… 6. Because of his good looks, he is popular with many girls.  Because ……………………………………………………………………………………… 7. Because of his serious sickness, he couldn’t come to the class.  Because ……………………………………………………………………………………… 8. Because of too much exhaust fume, people have to wear gauze masks in the streets.  Because ……………………………………………………………………………………… 9. Because of their good performance, they won the first prize.  Because ……………………………………………………………………………………….. 10. Because of your advice, we didn’t use that poisonous chemical.  Because ………………………………………………………………………………………