Cho đoạn thẳng AB có O là trung điểm. Kẻ Ax \(\perp\) AB, By \(\perp\) AB. Trên tia Ax lấy điểm C, trên tia By lấy điểm D sao cho góc COD = 90o. Chứng minh:
a, \(\Delta\) AOC ~ \(\Delta\) BOD c, \(\Delta\) AOC ~ \(\Delta\) ODC
b, AC.BD = \(\frac{AB^2}{4}\) d, AC + BD = CD
Help me - fold urgently
Rewrite:
1. You have to obey the rules.
=> You are
2. We musn't park our car here.
=> We are
3. She probadly leaves here soon.
=> It's likely
4. He managed to solve it.
=> He was
5. I find it hard to learn this subject.
=> I have
6. I don't agree with you in this situation.
=> I am
HELP ME~!!! :))