Traffic jams in Vietnam only frequently take in Hanoi capital and Ho Chi Minh City. Vietnamese people seem to be accustomed to traffic congestion, even miss it whenever they go to other places. There is no fixed rule for the the traffic jams to happen but is worst during the rush hour when everyone is in a hurry to get to work or come back home. Apart from peak hours, the time between 9 am and 10 am and between 3 pm and 4 pm also witnesses long lines of vehicles, mainly motorbikes, struggling to get of narrow streets.

Whenever it rains, the traffic jam gets more terrible with the joining hand of flooding. Taxis are extremely hard to or wave during the downpour. However, it only about 30 minutes on average for a standstill and 2 hours to get through the worst, not really bad compared to that of other countries. While the rapid increase in car use coupled with the deterioration of roads caused by disordered planning make the matter worse, the most annoying thing about the traffic jam the way people react when being at the congestion. Most road users ride their motorbikes on the pavement rather than waiting calmly, or they constantly use their horns to hasten riders in the front, even shouting at them from time to time. More luckily, bicyclists can leisurely carry their "war-horses" on their backs and thread their way through messy matrixes.

giúp mình nha

Cho tam giác ABC có AB = AC, trên cạnh AB lấy điểm M, trên cạnh AC lấy điểm N sao cho AM = AN. Gọi H là trung điểm của BC.

a) Chứng minh:ABH=ACH

b) Gọi E là giao điểm của AH và NM. Chứng minh :tam giác AME = tam giác ANE

HELP MÌNH VỚI !!!