Question

1-Calcule a distancia entre os pontos:
1) A(1,9)    e B( 2,8)                     2)  P(-5,4) e Q(-2,7)


3) C(-3,5) e D(-3,12)                    4) M(0,12) e N(9,0)

Answer 1

1) Dab^2 = (xb-xa)^2 + (yb-ya) ^2
Dab^2 = (2-1)^2 + (8-9)^2
Dab^2 = 1 + (-1)^2
Dab = raiz de 2

2) Dpq^2 = (xq-xp)^2 + (yq-yp)^2
Dpq^2 = (-2-(-5))^2 + (7-4)^2
Dpq^2 = 9 + 9
Dpq = raiz de 18

3) Dcd^2 = (xd-xc)^2 + (yd-yc)^2
Dcd^2 = (-3-(-3))^2 + (12-5)^2
Dcd^2 = 0 + 49
Dcd = 7

4) Dmn^2 = (xn-xm)^2 + (yn-ym)^2
Dmn^2 = (9-0)^2 + (0-12)^2
Dmn^2 = 81 + 144
Dmn^2 = 225
Dmn = 15