Răspuns :
Aria ΔABC=(l²√3)÷4
=15/4cm²
Aria ΔABC=AE.BC(AE inaltime in ΔABC,BC-baza)
15/4=AE.5√3
AE=15/4÷5√3
AE=15/4×1/5√3⇒AE=3/4√3
Sper sa intelegi!!!
=15/4cm²
Aria ΔABC=AE.BC(AE inaltime in ΔABC,BC-baza)
15/4=AE.5√3
AE=15/4÷5√3
AE=15/4×1/5√3⇒AE=3/4√3
Sper sa intelegi!!!