如图,点B,F,C,E在同一条直线上,AC、DF相交于点G,AB⊥BE,垂足为B,DE⊥BE,垂足为E,且AB=DE,AC=DF
如图,点B,F,C,E在同一条直线上,AC、DF相交于点G,AB⊥BE,垂足为B,DE⊥BE,垂足为E,且AB=DE,AC=DF。求证:①△ABC≌△DEF②GF=GC图...
如图,点B,F,C,E在同一条直线上,AC、DF相交于点G,AB⊥BE,垂足为B,DE⊥BE,垂足为E,且AB=DE,AC=DF。
求证:①△ABC≌△DEF
②GF=GC
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求证:①△ABC≌△DEF
②GF=GC
图 展开
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Locksmith Los Angeles
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When living in a beautiful city like Los Angeles Locksmiths with its beautiful parks and beaches and long history it's easy to forget about security and safety for your home or office. But you shouldn't let your beautiful surroundings lull you into a false sense of security.
Lock & keys problems can arise anywhere you are. So finding a reputable Los Angeles Locksmith services provider is a smart investment. When looking for a professional Automotive Locksmith Los Angeles it helps to ask around first. Asking a friend or family member if they have company that they can recommend may save you time and trouble in the future. It doesn't matter what job you need done anything for lock picking,Black Christian Louboutin, lock & keys replacement or installation of a high security lock. A professional Los Angeles locksmiths will always arrive with a fully equipped van to ensure he has everything he needs to assist you.
Remember you don't want someone who is going to just break your door so you can gain entry to your house,Discount Christian Louboutin Shoes, car or office, you want a locksmith that will lock pick and unlock door safely.Discovering that your home or office has been robbed is one of the worst feelings you can have. So ensuring that this never happens to you again is top priority. A Residential Locksmith Los Angeles service provider can repair or replace your broken locks. They can even assess your property and advice you on which locks best suit your individual needs.
Having their business card in your wallet or keeping their phone number in your cell phone can be a big help if you need it suddenly. You can even call if you need their services when you are out of town as most companies are part of a branch and have lock smith service providers for a number of different areas.
Most locksmith Los Angeles services are also available as a 24 hour emergency lock smith service. So you don't need to worry about what times you can call to get help. Always remember that lock & keys mishaps can happen at any time so it make sense to always keep your trusted Los Angeles Locksmith service provides contact details nearby.
Los angeles Locksmith services are in the business of helping people in distress. All it takes is a phone call to experience the services of our professional locksmiths - all of whom are licensed, insured and bonded. Our modern machine shop with the latest technology makes their work easier,Christian Louboutin Sandals, and relieves you of your concerns faster .
Los angeles Emergency Locksmith Los Angeles services guarantee with many professional servcies like, Automotive Locksmiths, Emergency Locksmiths, Residential Locksmiths, Commercial Locksmiths, Access Control Locksmiths,Christian Louboutin Bridal Shoes, CCTV Locksmiths, Alarm Systems Locksmiths,Christian Louboutin Ankle Boots, Intercom Locksmiths etc...
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∵BF=CE∴BC=BF+FC=CE+FC=EF
∵AB⊥BC DE⊥BE
∴∠ABC=∠DEF=90度
又∵AB=DE
∴⊿ABC≌⊿DEF(边角边)
在⊿GFC中
∠ACB=∠DEF(全等三角形对应角相等)
∴GF=GC
∵AB⊥BC DE⊥BE
∴∠ABC=∠DEF=90度
又∵AB=DE
∴⊿ABC≌⊿DEF(边角边)
在⊿GFC中
∠ACB=∠DEF(全等三角形对应角相等)
∴GF=GC
参考资料: http://zhidao.baidu.com/question/86868239.html?an=0&si=2
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证明:1.∵AB=DE,AC=DF,∠ABC=∠DEF,∴△ABC≌△DEF
2.∵△ABC≌△DEF,∴∠ACB=∠DFE,∴GF=GC
2.∵△ABC≌△DEF,∴∠ACB=∠DFE,∴GF=GC
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