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Cl a 6 a COROANA
Examinati desenul problemei 6 si determinati :
[AC] ∩ [BD] [BC] U [CE] [AD] \ [BE]
[BC ∩ [FE [AB U [DC [BF] ∩ [CB

A B C D E F G
.____.___.__.___.__.___. (ex 6 )


Răspuns :

AC ∩ BD= BC
BC∪ CE=BE
AD-BE cred ca e gresit poate e AD-BD=AB
[BC∩[FE= [BF]
[AB ∪[DC=AD
[BF]∩ [CB=[BC]