Question

Ex 2 va rog! Dau coroana !!

Answer 1

Răspuns:

Explicație pas cu pas:

2a) ABC echilateral

Aria =L^2*√3/4 = 64*3*√3/4= 48√3

b) Aria = cat1*cat2/2

Aria = 4√2*6√2/2 = 24*2/2 = 24

c) ABC drept.isoscel, <A=<C

<A+<C = 180-90 = 90, <A=<C = 45

Ducem inaltimea BD, D pe BC

AD = BC/2 = 6√6 = BD

Aria = AC*BD/2 = 12√6*6√6/2 = 36*6 = 216

d) Folosim aria cu sinus:

Aria = L1*L2*sin(L1,L2)/2

sin 150 = sin(150-90) = sin60 = √3/2

Aria = (6,4*15*√3/2)/2 = 1,6*15√3 = 24√3