mikedh/trimesh ⭐ 2,895 Python library for loading and using triangular meshes. 🔗 trimesh.org mckinsey/causalnex ⭐ 2,202 A Python library that helps data scientists to infer causation rather than observing correlation. 🔗 causalnex.readthedocs.io pyomo/pyomo ⭐ 1,939 An object-oriented...
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Copy the request code obtained on your Secure Email and Web Manager and paste it in the Cisco Smart Software Manager portal to select the required license Request code: CD-ZSMA:BD20B624E904-B7HCL9scQ-DD Choose the operation you want to perform: -...
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MN•DH,S△BDM+S△CDN= 1 2 BM•BD+ 1 2 CN•CD= 1 2 BD•(BM+CN), ∵BM+CN=MN,S△DMN=S△BDM+S△CDN, ∴BD=DH; (3)证明:∵∠ABD=90°,DH⊥MN,BD=DH, ∴MD平分∠BDH. 点评:本题考查了全等三角形的判定与性质,角平分线的判定,等边三角形的性质和等腰三角形的性质,(1)利用旋...
如图,正方形ABCD中,点P是边BC上一点,PH⊥BC交BD于点H,连接AP交BD于点E,点F为DH中点,PF交CD的延长线于点M,连接AF.(1)求证:△PHF≌△MDF;(2)当点P在线段BC上运动时,∠PAF的大小是否会发生变化?若不变,请求出∠PAF的值;若变化,请说明理由;...
(1)如图1所示,当点D在射线CF上,点H在射线AC上时,连接BH,过点D作MD⊥CD,交CB的延长线于点M. 求证:∠GBH+∠G=∠M; (2)如图2所示,当点D在射线CE上,点H在射线CA上时,试判断并证明DH与BD之间的数量关系.图1 图2试题答案 一题一题找答案解析太慢了下载作业精灵直接查看整书答案解析立即下载练习...
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