Question

Va rog, am nevoie de rezolvare completa...Dau coroana!

Answer 1

Ecuatia: 4(x-2)+8=x-3

4x-8+8=x-3

3x=-3

x=-1

Problema 1:

ABC Isoscel de baza BC => AB=AC=8.

Perimetrul=22 => BC=22-16=6 cm.

ABC isoscel, AD inaltime => AD mediana => BD= 6:2=3 cm.

Problema 2:

ABC echilateral => m(BAC)=60°

AD mediana, ABC echilateral => AD bisectoare => m (BAD)=60:2=30°.