Re: Determining Distance between 2 points

From: Andrea Ryan <aryan@global2000.net>

Date: Thu, 21 Sep 2000 00:00:00 +0000

Your triangle is a right triangle with one angle of 90 degrees.  Triangles that
have all sides of equal lengths are equilateral triangles and have three angles
of 60 degrees each.
Brendan

Chris Williams wrote:

> I'm calculating the distance for missle fire (arrows or rocks) and I have
> one question.
>
> When I plot out two points on a grid, and then use Pythagorean Theorem to
> calculate distance, I often come up with (at least) one square more than the
> actual number of squares on the most direct path (based on my grid).
>
> Should I subtract one from my calculated results, or add 1 to the number of
> squares?
>
> For Example:
>
> If I eyeball it on the grid, it's 5 squares from point a (top left) to point
> b (bottom right).
>
> If I actually calculate it, it's 7.07. Of course we would round down to 7
> squares, since we can't have a partial square.
>
> Any suggestions?
>
>   a=5
> . . . . . . .          5^2 + 5^2 = d^2
> .+- - -+.             25 + 25  = d^2
> . . \ . . | .                       50 = d^2
> . . . \ . | . b=5             7.07 = d
> . . . . \ | .
> . . . . .+.                          d = 7 (rounded)
> . . . . . . .
>
> So my result is 7, but if you base it off the grid, d should equal 5.
>
> Any advice is appreciated.
>
> Chris Williams

References

Determining Distance between 2 points
"Chris Williams" <williac6@rjrt.com>
Mon, 11 Sep 2000 20:22:52 +0000

Referenced By

Determining Distance between 2 points
"Chris Williams" <williac6@rjrt.com>
Mon, 11 Sep 2000 20:22:52 +0000