Current location - Training Enrollment Network - Mathematics courses - Mathematical problems. Third grade of middle school
Mathematical problems. Third grade of middle school
Solution: After point D, do DF⊥BC at point F.

∫∠C = 45，CD=4√2

∴DF？ ﹢FC？ =﹙4√2﹚?

∴DF=FC=4

∴BC=AD+FC=2+4=6

∫∠c = 45, BE⊥CD in E.

∴BE=EC

∴BE？ +EC？ =6?

∴BE=EC=3√2

Related articles
  • Mathematicians' stories are urgent! ! ! ! ! ! ! !
  • General steps of exploring laws in junior one mathematics.
  • Mathematical answers of Beijing college entrance examination in 2008
  • 20 15 mathematical modeling of college students
  • Is Fujian Mathematics College Entrance Examination 20 17 difficult?
  • Primary school mathematics time unit
  • How do primary school students learn math well?
  • What is the difficulty level of postgraduate mathematics?
  • What is a digital signal?
  • Qingzhou No.3 Middle School Admission Criteria

    • copyright 2024 Training Enrollment Network All rights reserved