Distance between coordinates - C

tanyajoseph · Posted: Sat Sep 01, 2007 11:30 am Post subject: Distance between coordinates - C

In the xy plane, point P has coordinates (a,b) and point Q has coordinates (c,d). What is the distance between P and Q?

1) b - d = 4
2) a - c = 3

agps · Posted: Sat Sep 01, 2007 12:10 pm Post subject:

distance between two points in a xy plane is given by sqrt((y2-y1)^2+(x2-x1)^2)

1) gives you y2-y1, but nothing on x2-x1, so insufficient.

2) gives you x2-x1, but nothing on y2-y1, so insufficient.

using bot you get the distance as sqrt(4^2+3^2) = sqrt(16+9) = sqrt(25) = 5.

Answer is C