Покажи решение задачи. АВС треугольник ВК биссектриса АС=6 АВ=12 ВК-?

AB = AV + VB = 12. Since AV is half of AC (bissector), AC = 2*6 = 12. Triangle ABC is isosceles, so angles A and B are equal. Thus, triangle ABK is similar to triangle ABC. VK is then half of BK. VK = 12/2 = 6.