What is the length of the line segment with endpoints (-3,4.5) and (5, 4.5)?

1 Answer
Alan P.
Jan 13, 2017

Length: color(green)8 units

Explanation:

The easiest way to see this is to note that both points are on the same horizontal line (y=4.5) so the distance between them is simply
color(white)("XXX")abs(Deltax)=abs(-3-5)=8

If you really want you could use the more general distance formula:
color(white)("XXX")"distance" = sqrt((Deltax)^2+(Deltay)^2)

color(white)("XXXXXXXX")=sqrt((-3-5)^2+(4.5-4.5)^2)

color(white)("XXXXXXXX")=sqrt((-8)^2+0^2)

color(white)("XXXXXXXX")=sqrt(64)

color(white)("XXXXXXXX")=8

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