Eric,
I'm sure I've asked this before. How do I determine the radius of a 3-point arc?
Thanks,
Mike
Radius of an arc
Radius of an arc
Mike Rosen
Seattle, WA, USA
Mac OS Ventura 13.1, iOS 11.4.1 on iPad Pro
Seattle, WA, USA
Mac OS Ventura 13.1, iOS 11.4.1 on iPad Pro
-
- Posts: 1073
- Joined: Sat Dec 03, 2011 12:31 pm
- Location: Tours - France
Re: Radius of an arc
Bonjour Mike,
You don't have to determine it, RealCADD do it for you.
Cordialement.
You don't have to determine it, RealCADD do it for you.
Cordialement.
Eric Pousse
Re: Radius of an arc
Sorry! I should have said, "how do I use the dimension tool to show me the radius of an arc?"
And on top of that, I just realized this is the wrong forum!
How do I use the dimension tool to show me the radius of an arc in iPocket Draw?
Sorry...
And on top of that, I just realized this is the wrong forum!
How do I use the dimension tool to show me the radius of an arc in iPocket Draw?
Sorry...
Mike Rosen
Seattle, WA, USA
Mac OS Ventura 13.1, iOS 11.4.1 on iPad Pro
Seattle, WA, USA
Mac OS Ventura 13.1, iOS 11.4.1 on iPad Pro
-
- Posts: 702
- Joined: Sat Dec 03, 2011 9:19 pm
- Location: Maine USA and Suffolk England
- Contact:
Re: Radius of an arc
Hi Mike
The simple answer is you can't – there isn't a radius dimension tool or a diameter dimension tool.
The standard length dimension tool will measure a diameter – but won't give you a diameter symbol (ø or Ø, d or D).
My Auto-size line script will do it – in metric or decimal US units (won't cope with fractional feet or fractional inches). And you can put in whatever leading or trailing symbols/text you want. It's not perfect but I use it all the time. Someday I'll perfect it (or ask Eric to!).
Ref your original question as asked – as far as I remember from schoolboy geometry there is only one circle whose circumference will pass through three non co-linear points and once you've drawn it, RealCADD does indeed tell you what the radius is. I often use this tool actually. If the three points are co-linear, then you have a straight line – which you could consider to be a circle of infinite radius ... if you really want to be pedantic about it
Have you tried the beta10? I'm having just a tiddly bit of trouble getting to grips with it. And I don't think it will draw a circle through three points!
Cheers -- George
The simple answer is you can't – there isn't a radius dimension tool or a diameter dimension tool.
The standard length dimension tool will measure a diameter – but won't give you a diameter symbol (ø or Ø, d or D).
My Auto-size line script will do it – in metric or decimal US units (won't cope with fractional feet or fractional inches). And you can put in whatever leading or trailing symbols/text you want. It's not perfect but I use it all the time. Someday I'll perfect it (or ask Eric to!).
Ref your original question as asked – as far as I remember from schoolboy geometry there is only one circle whose circumference will pass through three non co-linear points and once you've drawn it, RealCADD does indeed tell you what the radius is. I often use this tool actually. If the three points are co-linear, then you have a straight line – which you could consider to be a circle of infinite radius ... if you really want to be pedantic about it
Have you tried the beta10? I'm having just a tiddly bit of trouble getting to grips with it. And I don't think it will draw a circle through three points!
Cheers -- George
-
- Posts: 702
- Joined: Sat Dec 03, 2011 9:19 pm
- Location: Maine USA and Suffolk England
- Contact:
Re: Radius of an arc
Oh – now I've read it more – I see it's iPocketdraw not RealCADD – don't know if the answer I gave is good for that!
One of these days I'll get me an iPad ...
George
One of these days I'll get me an iPad ...
George
-
- Posts: 1073
- Joined: Sat Dec 03, 2011 12:31 pm
- Location: Tours - France
Re: Radius of an arc
Bonjour Mike,
With RealCADD like with iPocket Draw, there is no tool to do that directly.
You have to do it manually.
Cordialement.
With RealCADD like with iPocket Draw, there is no tool to do that directly.
You have to do it manually.
Cordialement.
Eric Pousse
Re: Radius of an arc
I'm moving this discussion to the iPocket Draw forum.
Mike Rosen
Seattle, WA, USA
Mac OS Ventura 13.1, iOS 11.4.1 on iPad Pro
Seattle, WA, USA
Mac OS Ventura 13.1, iOS 11.4.1 on iPad Pro