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ABC-Δ
m(<A)=90 grade
AD-inaltime
D apartine laturii (BC)
AB=6 cm
BD=3cm
 

sa se afle CD


Răspuns :

Aplici formula : [tex] AB^{2} =BC*BD => 36=BC*3=> BC=12 cm[/tex]
Daca BD+DC=BC => DC=CD=BC-BD=12-3=9 cm