1.已知,如图,在梯形ABCD两腰AD,BC的中点.【1】猜想;线段EF,DC的位置关系【2】EF=½【AB+CD]2.已知 如图,在梯形ABCD中,AB=CD,AD‖BC,点E在AD上,且EB=EC,求证AE=DE

1.已知,如图,在梯形ABCD两腰AD,BC的中点.【1】猜想;线段EF,DC的位置关系【2】EF=½【AB+CD]2.已知 如图,在梯形ABCD中,AB=CD,AD‖BC,点E在AD上,且EB=EC,求证AE=DE
1.已知,如图,在梯形ABCD两腰AD,BC的中点.【1】猜想;线段EF,DC的位置关系
【2】EF=½【AB+CD]
2.已知 如图,在梯形ABCD中,AB=CD,AD‖BC,点E在AD上,且EB=EC,求证AE=DE

1.已知,如图,在梯形ABCD两腰AD,BC的中点.【1】猜想;线段EF,DC的位置关系【2】EF=½【AB+CD]2.已知 如图,在梯形ABCD中,AB=CD,AD‖BC,点E在AD上,且EB=EC,求证AE=DE
1.EF平行于DC
∵点E,F是AD,BC的中点
∴EF平行于AB,CD EF=2分之1（AB+CD)
（梯形的中位线平行于两底且等于两底和的一半）
2.∵AB=CD 四边形ABCD是梯形
∴梯形ABCD是等腰梯形
∴∠ABC=∠DCB
∵BE=CE
∴∠EBC=∠ECB
∴∠ABC-∠EBC=∠DCB-∠ECB
即∠ABE=∠DCE
∵AB=CD BE=CE
∴△AEN全等于△DCE
∴AE=DE

Upgrade Mobile Phones ? Stay Connected With Same Number!!
Mobile phones have become a basic need for everybody, and there are numerous handset providers in the market to fulfill this requiremen...

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Upgrade Mobile Phones ? Stay Connected With Same Number!!
Mobile phones have become a basic need for everybody, and there are numerous handset providers in the market to fulfill this requirement. These are quite essential for communication purpose, and they help to stay connected with our near and dear ones. Whether we need to pass on an urgent message or any information, these devices are quite helpful in both manner.There are three ways to acquire any handset,nike air max light, 'pay as you go mobile', 'contract phones' and 'SIM free'. And after that there are different processes to upgrade the acquired mobile phone. In the first method, an individual gets a handset with a prepaid connection, which he/she can change at any point of time. There are no monthly rentals, and the subscriber has to pay the usage charges only. This deal is best suitable for students, and people who are lesser callers.In the second process, i.e. 'contract phones', a person has to enter into a contract by accepting some terms and conditions. For a particular time period, the subscriber can't switch to any other network provider. And he/she has to pay monthly bills along with the usage charges. These are slightly less expensive than the 'pay as you go' deal. And the SIM free mobiles are the most expensive amongst these three. It provides the freedom to choose any handset, and any network provider. People travelling from place to place prefer this kind of deals,air max pas cher, which keeps them open to any SIM. Few leading handset providers, who are offering these kind of deals are ? Nokia, Samsung, Motorola, Sony Ericsson, HTC,air max bw, Blackberry and LG.After the completion of the contract period of the first two deals, the role of Upgrade Mobile Phones comes. If a person gets tired of using a same mobile phone, and wants to change it,france air max, then he/she can upgrade it. An individual can easily move on to a new handset while staying with the same network. For this the provider will extend the contract period of the deal. The presence of numerous handset providers has confused people, and they search for a new mobile every now and then. There is a tough competition amongst the connection suppliers, and to retain the existing customers they offer various lucrative gifts and discounts. There are many benefits to stay with the same provider. First of all, he gets discount on the mobile phone while upgrading, and secondly, he/she stays with the familiar network provider.It is always advisable to avail a new handset through the network we are currently with. It becomes easier to retain the same number with same plan. Although very few options are provided for choosing a new phone,air max tn, they provide different packages too. Upgrading mobile phones is encouraged by the contract phone providers, who are becoming increasingly competitive. They provide their services at reduced price, and include more calls and minutes in plans. According to the budget of people, the connection suppliers offer various handsets at the of upgradation. But still there are people who enjoy the freedom of having any SIM with any mobile. There are many ways to upgrade mobile phones, but the online method is the best one now a days. There are many dedicated websites from where people can get their phones upgrade. These sites include affiliate websites and retailers' sites, which comes with comparison feature. It allows to compare different deals in a single platform, which is very helpful for people to take the decision whether upgrade is beneficial or not. And the reviews and blogs provided here, offer unbiased information about the deals and the upgrades of mobile phones. It helps the new users to take fair decisions about which option is best suitable for them. Anyone can add his/her experiences in the form of blog or review. There is no doubt in the fact that upgrading mobile phones is quite beneficial for the handset users. But a person must search around for the best deals, before going for a new mobile phone. The competitive market is filled with offers which result in bargains. And it is a cost effective way to retain the same number and acquire a new handset.
Upgrade Mobile Phones ? Stay Connected With Same Number!!
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