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va rog ajutatima am proba de evaluare urgent ......multumesc!

Va Rog Ajutatima Am Proba De Evaluare Urgent Multumesc class=

Răspuns :

1. teorema inaltimii ADpatrat=BDxDC=5x12, AD=rad60 2. BD=5, DC=9, BC=BD+DC=5+9=14 t. catetei ABpatrat=BDxBC=5x14, AB=rad70 Acpatrat=CDxBC=9x14, AC=3rad14 3. triunghi drepunghic isoscel catetele sun egale se aplica t lui Pitagora BCpatrat=ABpatrat+ACpatrat=16+16=2x16, BC=4rad2