Watching TV is one of the activities I like to do in my free time. The program I like most is the News at 7 p.m on VTV3. The reason why I like this program is that it’s very informative. It seems to be a “window to the world” with me. By watching it, I can learn about many things that are happening in the world without going there. Thanks to the News.
Last summer, I and my group spent our holiday at Vung Tau Beach. This is one of beautiful beaches in Viet Nam. It took two hours to take there. We concentrated in bus station. At 5 A.M we started our trip by bus. Although I feel tired after two long hours but sea air made me re-excited. Gradually, Bien Dong was in font of us. Bien Dong length 750 m with beautiful sea and form of entertainment is multiform. We arrange our bags and after that we quickly swum in blue sea. The weather was very nice. The golden light spread in white sand. Tiny waves crashing onto the beach. It is suitable for swimming. After swimming, we started to build sandcastles, listened the sound of the waves, felt the salted taste of sea and enjoyed some special foods. In the afternoon, we rode around on the road from back of the beach to font of the beach by double- bicycles. That was a wonderful sight. One sight is sea, the others is mountain. It really made me forget everything to relax. And then, we decided climb to Tao Phung mountain. Sightseeing is as beautiful as the other places. So we took many photograph. Standing God’s shoulder is great. We can saw mountain, houses and wide sea. When we climb down the mountain, we bought some souvenir for our friends. A day go by so fast. I wanted to stay there longer but we had to come back to work the day after. The trip was short but it had a strong impression on me and I had many memories with my friends. We come back Bien Hoa city and felt comfortable after a good holiday.
bn tự vẽ hình nha ^.^
xét tam giác ABC có M là trung điểm của AB , N là trung điểm của BC
➡ MN là đường trung bình của tam giác ABC
➡ MN //AC , MN =½AC (1)
tương tự xét tam giác ADC có QP //AC , QP=½AC(2)
từ (1) và (2)➡ MN=QP=½AC , MN//QP//AC
➡ MNPQ là hình bình hành (3)
xét tam giác ADB có M là TĐ của AB , Q là TĐ của AD
➡ QM là đường trung bình của tam giác ADB ➡ QM=½DB mà DB =AC (ABCD là HCN)➡ QM=½AC=MN(4)
từ (3),(4)➡ MNPQ là hình thoi