平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为B'..平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为
平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为B'..平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为
平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为B'..
平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为B',求DB’的长度.
如图
平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为B'..平行四边形ABCD,AC,BD交于E,∠AEB=45°,BD=2 将三角形ABC沿AC所在直线翻折到同一平面内,点B的落点为
将三角形ABC翻折后,得三角形AB'C,连接B'E,得BE=B'E=1,∠BEB'=90°∠B'BD=45°=∠BB'E
因为∠B'ED=90° EB'=ED 所以∠EB'D=∠EDB'=45°所以B'D=√(1²+1²)=√2
根号2,连BB’得到DBB’是等腰直角三角形
有两个人给出同一答案,3L说题意不清,什么情况???
这题题意表达不清
Wholesale Dropship Companies - The way to Spot a Scam
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Drop Ship Wholesalers
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First of all, let's discuss the way to identify an actual wholesaler. ...
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Wholesale Dropship Companies - The way to Spot a Scam
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Drop Ship Wholesalers
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First of all, let's discuss the way to identify an actual wholesaler. This can be a rather easy step, plus the previous installment,Nike Air Max 91, we touched this topic. As I mentioned,Nike Air Max 1, no real wholesale supplier can or will sell to most people. For this reason, they have to have proof that you are a real business owner before they are able to do business with you.
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The next topic I want to discuss today is how you can protect yourself from fraudulent sellers. Unfortunately, there are numerous of scammers out there desperate to take advantage of retailers. Because of this,Nike Air Max Skyline, I recommend which you purchase everything through a couple of options:1 - Pick it up and pay for it face-to-face.2 - Make use of a Bank card so that you will may file a chargeback if you're defrauded from the seller.3 - Don't use anything but PayPal In the event you fund the payment with a charge card. (Explained Below).These three payment methods will almost guarantee your protection from wholesale scams,sale cheap Nike air max 24/7, and that i only advise paying using permanently once you learn a supplier as honest, otherwise you highly trust the recommendations of your colleague. When first employing a wholesaler, Avoid the use of a money order or cashiers check, and run one other way in case you are approached with a seller wanting one to pay by Western Union. This is the payment approach to option for many overseas scams.
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连接B'E 证明ABE全等AB'E (AB=AB’ ∠BAE=∠B'AE AE=AE) 所以∠B'EA=∠BEA=45° BE=B'E=1 ∠B'EB=∠B'EA+∠BEA=90° 在RT△B'ED中 根据勾股定理得:剩下不用说了 知道B'E=1 ED=1 B'D就=根号5
连接B'E 证明ABE全等AB'E (AB=AB’ ∠BAE=∠B'AE AE=AE) 所以∠B'EA=∠BEA=45° BE=B'E=1 ∠B'EB=∠B'EA+∠BEA=90° 在RT△B'ED中...
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连接B'E 证明ABE全等AB'E (AB=AB’ ∠BAE=∠B'AE AE=AE) 所以∠B'EA=∠BEA=45° BE=B'E=1 ∠B'EB=∠B'EA+∠BEA=90° 在RT△B'ED中 根据勾股定理得:剩下不用说了 知道B'E=1 ED=1 B'D就=根号2
刚刚说错 不好意思啊
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