Author Topic: What is the mathematical name for a 'circle sector' applied to a 'ring'?  (Read 4029 times)

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Offline 741Topic starter

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I'm drawing a graphic which is like a doughnut chart. If we call the shape between 2 concentric circles a 'ring', what is the correct term for a 'partial ring'?

(I'd like to give the relevant variables meaningful names, preferably based around mathematically correct terms)

Online Mechatrommer

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #1 on: October 18, 2019, 01:28:07 pm »
just google "partial donut shape mathematics"
Annulus Sector
Annulus (Mathematics)
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Offline 741Topic starter

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #2 on: October 18, 2019, 02:25:05 pm »
OK Thanks, it seems the term is going to be "Annular Sector".

Offline SiliconWizard

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #3 on: October 18, 2019, 02:34:36 pm »
The "correct" math term would be annulus sector, but I admit this doesn't sound very appealing for some reason, so I'll concede the annular sector.
 
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Offline 741Topic starter

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #4 on: October 25, 2019, 08:49:15 pm »
That was my intuitive feeling, but I must (now) admit "annular sector", whilst sounding nicer, is a contradiction: Like saying "circular sector". A sector cannot be itself circular or annular I suppose.

Offline Nominal Animal

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #5 on: October 26, 2019, 03:07:03 am »
I admit, the first thing that came to my mind was "sphincter".  But yeah, annulus it is.
 

Offline SiliconWizard

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #6 on: October 26, 2019, 02:27:35 pm »
That was my intuitive feeling, but I must (now) admit "annular sector", whilst sounding nicer, is a contradiction: Like saying "circular sector". A sector cannot be itself circular or annular I suppose.

Yeah, it didn't sound this weird to me at first (due to this not being my native language), but it is. It's not exactly a contradiction I'd say, more like a definition turned upside down.
But yeah, "annulus" frankly sounds horrible. :-DD

Even if it's probably less correct, and more informal, wouldn't "ring sector" be appropriate, and sound better?
« Last Edit: October 26, 2019, 02:31:26 pm by SiliconWizard »
 

Offline SL4P

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #7 on: October 27, 2019, 02:06:22 am »
I’ll throw ‘arc’ into the discussion!
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Online Mechatrommer

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Re: What is the mathematical name for a 'circle sector' applied to a 'ring'?
« Reply #8 on: October 27, 2019, 06:09:19 am »
really, whats wrong with Annulus? its not like Annalus and Annalar wont solve anything... there will be always something to talk, move on!...



I’ll throw ‘arc’ into the discussion!
arc is a "curvular" line of zero area. https://en.wikipedia.org/wiki/Arc_(geometry) whatever
Nature: Evolution and the Illusion of Randomness (Stephen L. Talbott): Its now indisputable that... organisms “expertise” contextualizes its genome, and its nonsense to say that these powers are under the control of the genome being contextualized - Barbara McClintock
 


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