# Thread: How to draw line to extact cordinate and exact lenght?

1. ## How to draw line to extact cordinate and exact lenght?

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Sorry for the extremly beginner question.

I would like to draw a line that is a specific length, lets say 16, that orginates from a specfic x,y location say 10,23, that terminates at exactly atleast the y cordinate 38. I dont care about the x or the angle.

Thank you..

2. If you use Polar Tracking (F10) Object Snap Tracking (F11) and have Osnaps turned on (F3) (if your starting at a point on another entity) otherwise you can start a line and then drag your mouse in the direction you want to go then just type in the distance you want to draw to in the command line.

Or type in the command line @0,20 where the 0 is the x value and the 20 is the y value.

3. I would use geometry to accomplish...if you want this to be EXACT.
1. Draw a line from 0,38 to 50,38 using absolute coordinates.
2. Draw a circle with a center of 12,23 and a radius of 16.
3. Draw a line from the center of the circle to either of the intersections of the circle. (Resulting in a line from 10,23 to either point - there will be two - corresponding with the y-coordinate of 38.
Hope this helps.
BTW - Welcome to the forum! (Can I do that even though I am not a moderator?)

4. There are 2 solutions:
Y=38
1) X=10+sqrt(16^2-15^2)
2) X=10-sqrt(16^2-15^2)

5. thank you! thought maybe i could cheat it but the geometry worked out!

6. Originally Posted by bill_borec
BTW - Welcome to the forum! (Can I do that even though I am not a moderator?)
of course you can - this is a community!

7. Try this : @ Distance < angle

8. Originally Posted by jgbgod
Try this : @ Distance < angle
I am not sure how that would work in this case. The distance is certainly known, but not the angle. The difference in the y distance is known, so there are two solutions, which your method does not seem to cover.

9. use "dynamic cordinates" and press tab to enter different values

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Just use dynamic input... just like techbert said...
fixed line length.gif

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