Răspunsuri

2014-03-10T11:18:22+02:00
AB supra AC = 3 supra 4 --> 3AC = 4AB --> AB = 3AC/4
A = AB * AC * sinA 
A = 3AC/4 * AC 
A = 3*AC²/4
216 = 3*AC²/4
3*AC² = 4 * 216
AC² = 864/3
AC = √288
AC = 12√2 

AB = 3*12√2/4
AB = 9√2 

BC² = AB² + AC²
BC² = (9√2)² + (12√2)²
BC² = 81*2 + 144*2
BC² = 162 + 288
BC = √450
BC = 15√2

P = AB + AC + BC 
P = 12√2 + 9√2 + 15√2
P = 36√2