Question

seja o segmento ab, cujo ponto médio M tem coordenadas (3,4), se o ponto A,tem coordenadas (2,-2) qual as coordenadas do ponto B?

Answer 1

A(2,-2)
B(x,y)
M(3,4)

xm = ( xa + xb ) / 2

3 = ( 2 + x ) / 2

6 = 2 + x

x = 6 - 2

x = 4

ym = ( ya + yb ) / 2

4 = ( -2 + y ) / 2

8 = -2 + y

y = 8 + 2

y = 10

B(4,10)