cho tam giác abc cân tại a có đường trung tuyến am. a)c/m am vuông bc b)tính am . biết ab=10,bc=12

Các câu hỏi liên quan

Những từ cần điền stop -Ideal -slow -weigh -advantage -strong- weak - quickly ............................................................. Along with jogging and swimming, cycling is one of the best all-round forms of exercise. It can help to increase your (1)……………and energy, giving you more efficient muscles and a stronger heart. But increasing your strength is not the only (2)…………….of cycling. Because you’re not carrying the (3)…………..of your body on your feet, it’s a good form of exercise for people with painful feet or backs. However, with all forms of exercise it’s important to start (4)……………..and build up gently. Doing too much too quickly can damage muscles that aren’t used to working. If you have any doubts about taking up cycling for health reasons, talk to your doctor and ask for his/her advice. (5)………………, you should be cycling at least two or three times a week. For the exercise to be doing you good, you should get a little out of breath. Don’t worry that if you begin to lose your breath, it could be dangerous and there must be something wrong with your heart. This is simply not true; shortness of breath shows that the exercise is having the right effect. However, if you find you are in pain then you should (6)………..and take a rest. ...................................................................... Yêu cầu: +Đầu tiên dịch nhưng từ cần điền +Sau đó điền và giải thích vì sao `to` Các bạn buộc phải làm những yêu cầu đó cho mình nhé !