AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CP

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AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CPAB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP

AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CP
AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CP

AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CP
证明:因为∠QAP=∠BAC,
∠QAP-∠BAP=∠BAC-∠BAP
即:∠QAB=∠PAC,
因为AP绕A顺时针旋转至AQ
所以AP=AQ
又AB=AC
所以△QAB≌△PAC
所以BQ=CP

China's highway construction project general contracting business risk analysis


Sector, to invest higher than the multi-million take up to several years of systems engineering, the m...

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China's highway construction project general contracting business risk analysis


Sector, to invest higher than the multi-million take up to several years of systems engineering, the management objectives must be well-organized system can be achieved, it is necessary to establish relevant organizations. (2) specify the persons responsible for risk management. Establishment of risk in project development manager, to determine the project risk events control responsibilities, which is assigned to implement specific activities and control risk events responsible work. Highway construction projects as general contractor's core enterprise risk management, risk manager's position can not be ignored, the work is completed will have a direct impact on the development of business success or failure. (3) the development of risk management plan. There are three basic ways to develop risk management plan: First, prevention programs, that take early action to reduce the risk probability of occurrence. Second, mitigation plans, that the risk occurs,abercrombie pas cher, the consequences of possible risk mitigation. Third, contingency planning, risk occurred, to take emergency measures to respond to the risk. (4) the implementation of risk control programs. Determine the risk of events in accordance with control programs, to carry out specific activities, control activities, risk events. This step must be based on the risk of the development of the changes constantly being revised risk control program of events and methods to track the results of the risk of incident control, control of risk events to collect information and give feedback, namely the use of tracking to identify the risks taken by the event control activities are effective, whether the risk of the development of the new changes, etc., so you can continue to provide feedback to guide the specific risk event control program implementation. 4. Conclusion enter the 2l century, China is stepping up construction of a more comprehensive, better road network. To the rich, first build roads, which is popular folk saying, road construction can promote local economic development. Highway construction project is the infrastructure of China is a very important component of infrastructure investment account for a large proportion, but the risk is everywhere. Currently we have the risk of highway construction projects is not enough,franklin marshall paris, the road project risk management should be long-term perspective, constantly sum up experience, build roads in the highway construction project risks in the file system, road builders provide a useful reference, China's road construction in order to make the big step to make our highway construction project risk management into a new level. [References] [1] XU Shu people. The origin of the international engineering contracting market and to open up [J]. International engineering and services,sac hermes birkin, 2003 (4) :24-26 [2] Paul even. Project management [M]. Dalian: Dongbei University Press, 2001. [3] Li Zhaoyu. Project risk management: processes, technology and insight [M]. Beijing: Electronic Industry Press, 2003. [4] ZHOU Xu Yang. Project cost basis [M]. Beijing: China Central Radio and TV University Press, 20O7. TheRiskAnalysisofTotalContractEnterprisesinHighwayProjectConstructionGUOLei ', (1.CivilEn coffee eeringInstitute, NortheastF0restryUniversity, Harbin150040, China; 2.CivilEngineeringDepartment, Heilont ~ angInstituteofTechnology, H8Ibin150050, China) Abstract: HighwayconstructionprojectsareChina'Smajorinfrastructureproj ~, andhaeenwidelyapp1iedatotalcontractmode. Ac-cordingtothecharacteristicsofChina'Shighwayconstructionprojectandbusinessscopeoftotalcontractenterprises,abercrombie pas cher, byacomprehensiveanalysisofallkindsofrisks, constructivesuggestionstoitsmonitoringandtreatmenta Tuo propo ~. Keywords: highway; constructionproject; totalcontractmode; riskanalysis
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AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CP AB=AC,若P是△ABC内部任意一点,将AP绕A顺时针旋转至AQ,使∠QAP=∠BAC,连接BQ,CQ,求证:BQ=CP 已知:P是△ABC内任意一点,试说明AB + AC > BP +PC 已知△ABC是正三角形,点P为内部任意一点,过点P作PE⊥AC,PF⊥BC,PG⊥AB .....点E,F,G,分别为垂足,h喂△ABC的高,a为△ABC的边长.求证:PE + PF + PG=h 如图,已知△ABC中,AB=AC=4,P是BC上任意一点,PD⊥AB于D,PE⊥AC于E,若△ABC的面积为6,则PD+PE=3 对吗 如图所示,已知△ABC中,AB=AC=4,P是BC上任意一点,PD⊥AB于D,PE⊥AC于E,若△ABC的面积为6,求PD+PE的值 已知△ABC 中,AB=AC=4,P是BC上任意一点,PD⊥AB于D,PE⊥AC于E,若△ABC面积为6,求PD+PE的值如图,自己拍的哈 在△ABC中,AB=AC,点P是三角形内部一点,且∠APB>∠APC.求证PB<PC(用反证法证明) 在三角形ABC中 AB=AC P是BC上任意一点,求证:AB^-AP^=PB*PC 复习“全等三角形”的知识时,老师布置了一道作业题:“如图①,已知在△ABC中,AB=AC,P是△ABC内部任意 【数学证明题】如图,△ABC是等腰三角形,AB=AC,P是底边上任意一点,PE⊥AC于点E,如图,△ABC是等腰三角形,AB=AC,P是底边上任意一点,PE⊥AC于点E,PD⊥AB于点D,BF是腰AC上的高,求证:PE+PD=BF. 在△ABC中,AB=AC,P是BC边上任意一点,求证:AC²=AP²+CP*BP.图形: 如图,在△abc中,ab=ac,点p是bc边上任意一点,是说明ab²-ap²=bp乘cp 在Rt△ABC 中,AB=5,AC=4,BC=3,P是△ABC 内任意一点,求PA+PB+PC的最小值 在三角形ABC中,AB>AC,AD是△ABC的角平分线.P是AD上的任意一点,求证AB-AC>PB-PC 在△ABC中,AB=AC,P是BC边上任意一点,证明:AP的平方=AB的平方-PB·PC 在△ABC中,AB=AC,P是BC上任意一点,连接AP求证AB的平方-AP的平方=BP×CP 如图,△ABC中,AB=AC,点P是边上任意一点,试说明AB²-AP²=BP·CP