Tìm tọa độ điểm C

Để tìm tọa độ điểm C, ta cần tìm tọa độ của trọng tâm G của tam giác ABC.

Trọng tâm G của tam giác ABC có tọa độ (xG, yG), trong đó:
xG = (xA + xB + xC) / 3
yG = (yA + yB + yC) / 3

Với A(1, -1), N(5, -3) và G thuộc trục Ox, ta có:
xG = (1 + xB + xC) / 3
yG = (-1 + yB + yC) / 3

Vì G thuộc trục Ox, nên yG = 0. Thay yG = 0 vào công thức trên, ta có:
(-1 + yB + yC) / 3 = 0
yB + yC = 3

Vì C thuộc trục Oy, nên xC = 0. Thay xC = 0 vào công thức trên, ta có:
(1 + xB + 0) / 3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 = 1/3 + xB/3 =