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JVERDE
23rd Mar 2008, 05:34 pm
I am a new user of Autocad LT and I was wondering if you could help me out with drawing a tangent line to a point on a circle. I am having a lot of trouble so any advice would be much appreciated.

Alan Cullen
23rd Mar 2008, 06:45 pm
No worries mate.

First, draw a line from the centre of the circle (osnap CENTRE), and for the second point, pick the point on the circle you want the tangent to be at.

then use ROTATE, pick that line you just drew, pick the endpoint (on the circle), and rotate it 90. That is your tangent.

P.S. Welcome to the forum.

Lazer
23rd Mar 2008, 10:41 pm
Many ways to skin a cat, I will add another way, draw a circle then draw a line anywhere on screen and then hold shift then rightmouse click and select tangent, then move mouse to the circle and it will snap a tangent for you , then rotate it to the correct position.

Alan Cullen
23rd Mar 2008, 11:27 pm
ahh, yes lazer, that is the one I use often. Forgot about it this time, but well done, mate.

I didn't even think about osnap TAN. :lol:

JamalNUMAN
7th Aug 2013, 07:51 am
Many ways to skin a cat, I will add another way, draw a circle then draw a line anywhere on screen and then hold shift then rightmouse click and select tangent, then move mouse to the circle and it will snap a tangent for you , then rotate it to the correct position.

Greetings,

My issue here is that I wanted to draw a line tangent to a circle at a PARTICULAR point (attached).

What might be the best practice to accomplish this with least number of steps?

Thank you

Best

Jamal

danellis
7th Aug 2013, 08:15 am
Use Allan's method, specifying 48d13" as the angle for your initial line, set its length to the radius of the circle (if known, if not set a fairly random but ball-park length and extend/trim so it hits the line) then rotate 90 or 270 degrees.

dJE

eldon
7th Aug 2013, 08:47 am
If the radius line is already drawn, then, with polar tracking enabled, just draw the tangent from the endpoint of the radius. Polar tracking will show you the lines at right angles to the radius. :D

JamalNUMAN
7th Aug 2013, 08:57 am
If the radius line is already drawn, then, with polar tracking enabled, just draw the tangent from the endpoint of the radius. Polar tracking will show you the lines at right angles to the radius. :D

Many thanks guys for the help. It works fine

Best

Jamal