Question

seja M o ponto médio do segmento AB .calcule as coordenadas do ponto B .a) A (3,2) e M (4,3) b) (-1,3) e M (2,1/2).

Answer 1

(3+xB)/2 = 4 => 3 + xB = 8 =>xB = 5
(2+yB)/2 = 3 => 2 + yB = 6 => yB = 4
B(5, 4)

(xA - 1)/2 = 2 => xA - 1 = 4 => xA = 5
(yA + 3)/2 = 1/2 => yA + 3 = 1 => yA = -2
A(5, -2)