cho fintinuidng M diam A B C D nom then anh ) A - Dicamon

Question

cho fintinuidng  M diam  A B C D nom then anh  ) A M · M D = B M · M C Qua B heduring thaig vuing goo voi DM tait. Chieg minh BHCD nä diep  B C ( H  B C  )

Answer

B , ∩ D (a)  B D ( 1  )  d + e at ttron thion  ⇒   3  B D ( Q  ) ect otk  ( ∘ ) Lairco.  - 1 - 1 (  B D ci hwoung)  ⇒/_ B C D  B b tai C  ⇒ 30^- 1 B , H , D nt  B C D / on drinh

Answer

Th Co  90^∘ tar  B O  /_ B + D  B +_ |_D M nt itren it kirh  ⇒ 3  C di  ⇒/_ B C D i g edt otk  A B C D / 0^∘ Larcó.BCD  H (  ) /  = 13 d^' B , C D n hwoing)  w i d e B̂ ̂Ĥ ̂Ô =

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