how to draw this...

[chaarr]

hello friends..

 

I have an ellipse drawn in autocad. can you please tell me how to draw a perpendicular line to the ellipse through a given point on that ellipse?

[eldon]

One way to do it would be to offset the ellipse, and then from the given point draw a line perpendicular to the offset line.

[JD Mather]

If you can get access to AutoCAD 2011 (free trial download) you could use Geometric Constriants.

[designerstuart]

you can construct the tangent by a line from centre to given point and rotate 90 degrees

[SEANT]

Another possible method:

 

Xlines support deferred object snaps, so this command sequence precedes the attached illustration.

 
Command:
Command:
Command: _xline Specify a point or [Hor/Ver/Ang/Bisect/Offset]: per
to
Specify through point: nod
of

A command macro to preset the action would be something like this:

 

^C^C_xline;per;\nod;\;

 

The construction lines can be trimmed as necessary.

[JD Mather]

you can construct the tangent by a line from centre to given point and rotate 90 degrees

 

Can you post an example dwg or just an image demonstrating that technique?

[JD Mather]

One way to do it would be to offset the ellipse, and then from the given point draw a line perpendicular to the offset line.

 

Can you post a dwg or just an image demonstrating that technique?

[eldon]

Can you post a dwg or just an image demonstrating that technique?

 

I hope I get full marks Professor, otherwise I will write it up in "Rate Your Professor"

[designerstuart]

Can you post an example dwg or just an image demonstrating that technique?

ANSWER: no. i humbly retract my false solution

 

lucky all my curves are circles!

[eldon]

Can you post a dwg or just an image demonstrating that technique?

 

I did you the courtesy of responding within the hour to your outrageous demand of justification.

 

I would have expected you to reciprocate with the courtesy of a reply. Or is that too much to expect from Academia?

[JPlanera]

I did you the courtesy of responding within the hour to your outrageous demand of justification.

 

I would have expected you to reciprocate with the courtesy of a reply. Or is that too much to expect from Academia?

 

ouch...