Объяснение:
BC = √((xc - xb)^2 + (yc - yb)^2 + (zc - zb)^2) = √((-1 - (-1))^2 + (0 - (-3))^2 + (0 - 3)^2) = √0+9+9 = 3√2
BC = AC
AC^2 = (xc - xa)^2 + (yc - ya)^2 + (zc - za)^2 = 18
(-1 - (-2))^2 + (0 - 1)^2 + (0 - k)^2 = 18
1 + 1 + k^2 =18
k^2 = 16
k= 4 k -4
Объяснение:
BC = √((xc - xb)^2 + (yc - yb)^2 + (zc - zb)^2) = √((-1 - (-1))^2 + (0 - (-3))^2 + (0 - 3)^2) = √0+9+9 = 3√2
BC = AC
AC^2 = (xc - xa)^2 + (yc - ya)^2 + (zc - za)^2 = 18
(-1 - (-2))^2 + (0 - 1)^2 + (0 - k)^2 = 18
1 + 1 + k^2 =18
k^2 = 16
k= 4 k -4