ΔABC,AD⊥BC,Aria ABC=12cm²,BC=8,AD=?

Răspuns :

Aria ABC = AD x BC / 2
Inlocuim 12 = 8AD /2
8 AD= 24
AD =24/8
AD=3
A = baza*h/2
12 =8*h/2
h =12*2 /8 =24/8 =3 cm