1. Distance between 2 points
- Posted by PatRat <patrat at MAIL.GEOCITIES.COM> Sep 29, 1998
- 515 views
Hello, Does any1 know how to calulate the distance and angle from point A to point B given their coordinates. Thanks --PatRat (Thomas Parslow) -- ()___() -- (o o) -- =\O/= -- Rat Software -- http://www3.mistral.co.uk/billparsl/
2. Re: Distance between 2 points
- Posted by "Carl R. White" <C.R.White at SCM.BRAD.AC.UK> Sep 30, 1998
- 494 views
On Tue, 29 Sep 1998, PatRat wrote: > Hello, > Does any1 know how to calulate the distance and angle from > point A to point B given their coordinates. > Thanks At the risk of answering homework here :) opposite = b[Y] - a[Y] adjacent = b[X] - a[X] distance = sqrt(power(opposite,2)+power(adjacent,2)) angle = arctan(opposite/adjacent) -- Carl R White E-mail...: cyrek- at -bigfoot.com -- Remove the hyphens before mailing. Ta :) Url......: http://www.bigfoot.com/~cyrek/ "Ykk rnyllaqur rgiokc cea nyemdok ymc giququezka caysgr." - B.Q.Vgesa
3. Re: Distance between 2 points
- Posted by "Carl R. White" <C.R.White at SCM.BRAD.AC.UK> Oct 02, 1998
- 512 views
> PS: Do you know what radians are? I know that they are a measurment > of angle but nothing else. A circle can be split up in a number of ways. The three most common (found on any scientific calculator) are Degrees, Radians, and Gradians. Degrees split the circle into 360 seperate units and Gradians 400 (decimalised: 100grads in a right angle). Radians are mathematically more useful though, in that a circle is split into 2*Pi radians. Since a circle's diameter = 2*Pi*Radius, 1 Radian is the distance equivalent to the radius round the outside of the circle. Hence the name "radian". Pi = arctan(1) * 4 = about 3.1416. A radian is equal to 180/Pi (or 360/(2*Pi), see the relation?) degrees. That's about 57.2958 degrees in real money. A gradian = 0.9 degrees. (360/400 or 9/10) HTH, Carl -- Carl R White E-mail...: cyrek- at -bigfoot.com -- Remove the hyphens before mailing. Ta :) Url......: http://www.bigfoot.com/~cyrek/ "Ykk rnyllaqur rgiokc cea nyemdok ymc giququezka caysgr." - B.Q.Vgesa