Question

O paralelogramo ABCD pertence a um plano cartesiano, em que A (1, 5), B (-1, 1), C (2, 4) e D (Xd, Yd)

Answer 1

Ola Annec

Mx = (Ax + Cx)/2 = (1 + 2)/2 = 3/2
My = (Ay + Cy)/2 = (5 + 4)/2 = 9/2

M(3/2,9/2) 

(Bx + Dx)/2 = 3/2 

Dx - 1 = 3
Dx = 4

(By + Dy)/2 = 9/2

Dy + 1 = 9
Dy = 8

D(4,8)