Răspuns :
A__________B
l l
l l
l l
l E l
D__________C
BE=DC=BC(ABCD patrat) =>ΔBEC isoscel
La fel si AE=AD=DC =>ΔBAE isoscel =>∡BAE≡∡BEA
Intr-un patrat diagonala este bisectoare =>m(∡ABE)=45°
=>m(∡BAE)=m(∡BEA)=(180-45)/2=67,5°
l l
l l
l l
l E l
D__________C
BE=DC=BC(ABCD patrat) =>ΔBEC isoscel
La fel si AE=AD=DC =>ΔBAE isoscel =>∡BAE≡∡BEA
Intr-un patrat diagonala este bisectoare =>m(∡ABE)=45°
=>m(∡BAE)=m(∡BEA)=(180-45)/2=67,5°
BE≡DC≡AB⇒ΔBAE isoscel de baza AE
dar m∡ABE=45° (unghi formate diagonala cu o latura in patrat)
⇒m∡BAE=(180-45)°/2=90°-22°30'=67°30'
dar m∡ABE=45° (unghi formate diagonala cu o latura in patrat)
⇒m∡BAE=(180-45)°/2=90°-22°30'=67°30'