URGENTTTTTT!!!!!!!!! VA ROGGG!!!! Aflati aria triungiului ABC stiind ca: a) AB=5 cm, BC=6 cm si m(B)=30° b) AB=8 cm, BC=2 cm si m(B)=60° c) AC=2 cm, BC=10 cm si m(C)=45° d) AB=10 cm, AC=8 cm si m(A)=50°

Question

Matematică

beataachim

8 apr. 2018, 20:44:30

7

URGENTTTTTT!!!!!!!!! VA ROGGG!!!! Aflati aria triungiului ABC stiind ca: a) AB=5 cm, BC=6 cm si m(B)=30° b) AB=8 cm, BC=2 cm si m(B)=60° c) AC=2 cm, BC=10 cm si m(C)=45° d) AB=10 cm, AC=8 cm si m(A)=50°

+0

(1) Răspunsuri

Answer 1 · 2018-04-09T05:36:45+03:00

a)ducem AD _l_ pe BC ,Ad mediana ⇒BD =Bc :2 ⇒BD =3 In ADB ,m(D)=90 ⇒TP [latex] AD^{2} = AB^{2}-BD ^{2} [/latex] AD2 =25-9 AD =√16=4 A= IxB /2 =4x6/2=12cm2