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forum.matefbc.ro • Vezi subiect - Relatie in triunghiul oarecare si consecinte

Relatie in triunghiul oarecare si consecinte

Geometrie clasa a7a

Relatie in triunghiul oarecare si consecinte

Mesajde mihai miculita » Lun Ian 03, 2011 8:01 am

mihai miculita
 
Mesaje: 2
Membru din: Sâm Ian 01, 2011 7:22 pm

Re: Relatie in triunghiul oarecare si consecinte

Mesajde vaneacsu » Dum Feb 20, 2011 6:24 pm

a) Fie D', E' si F' intersectiile dreptelor AP, BP, CP, respectiv cu laturile BC, CA, AB. cum si sunt paralele, conform teoremei lui Thales . Analog pentru celelalte. Se insumeaza, iar in stanga se obtine suma ceruta, iar in dreapta este teorema lui Gergonne.
vaneacsu
 
Mesaje: 11
Membru din: Vin Iul 03, 2009 6:47 pm

Re: Relatie in triunghiul oarecare si consecinte

Mesajde vaneacsu » Dum Feb 20, 2011 6:25 pm

b) Daca P = I, atunci PF = r , PE = r, PD = r . Inlocuind in a) si impartind prin r obtinem relatia ceruta.
vaneacsu
 
Mesaje: 11
Membru din: Vin Iul 03, 2009 6:47 pm

Re: Relatie in triunghiul oarecare si consecinte

Mesajde vaneacsu » Dum Feb 20, 2011 6:27 pm

c) Daca triunghiul ABC este echilateral, atunci . Inlocuind in a) si inmultind cu se obtine relatia ceruta.
vaneacsu
 
Mesaje: 11
Membru din: Vin Iul 03, 2009 6:47 pm


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