Geometry question

[mental4astro]

Hi all,

I saw something intriguing on the Sun on Saturday, and I'm at a loss on how to describe what I saw. There was a series of filament arcs that were in a line all along side each other, somewhat resembling shark gills. I saw four of these filaments - something I had never seen before.

My question then is, what is the description for a series of 'parallel arcs'? This is the best way I have to describe it.

197327

They are not co-centric as they are all of the same radius. They are 'parallel' as best as I can say.

Anyone can offer a description?

Mental.

[graham.hobart]

arcades?

[mental4astro]

Clever, really clever, :)

Smart arse... :rolleyes: but clever.

[UniPol]

Someone has to be serious so I would say they are offset arcs. For them to be parallel or concentric arcs they would have to have the same centre radii.

[graham.hobart]

was being serious - there are a series of arcs in certain blood vessel networks which are not parallel but are called arcades -denoting a system of similar arcs only. See arterial arcades and the vasa recta in the small intestine.

[Kunama]

Murder of Crows ...
Parliament of Owls ...
Herd of Cows ...
.....
Offset of Arcs ............... that makes sense........ :question:

[Robh]

To translate an object, you slide it to a new position without any rotation or change in size. If they were all the same length and radius they would be translated arcs.
Maybe, a series of translated arcs in the same direction.

Regards, Rob

[raymo]

Offset arc echos, or maybe offset repeatarcs.
raymo

[graham.hobart]

archaeoptics?:rofl:

[mental4astro]

:ashamed: :rolleyes: :)

[mental4astro]

Not as easy a description as i thought!

[rally]

I'll have a crack,

5 equidistant radially spaced congruent arcs of diminishing measure of arc from approx 160 to 90 degrees

But a picture tells a thousand words !

[AstralTraveller]

Fireworks??? :scared3:

[el_draco]

Bloody 'ell, I warned you about working such long hours... ;)

[bojan]

Linear array of arcs.

[AndrewJ]

Nissen Hut frames??

Andrew

[multiweb]

Homer's missing hair. :cool3:

[rustigsmed]

apparent linear array of arcs

[Kunama]

lens aberrations

[deanm]

Bent.

Dean

[csb]

Graham's answer, arcade, seems to be the most suitable term. And it has the word "arc" in it.

An internet search doesn't show an actual term except arcade - a series of arches supported on columns.

[jenchris]

Architecturally they would be offsets. If they weren't offset in the same direction, they would be arrayed arcs.

[OICURMT]

https://en.wikipedia.org/wiki/Parallel_curve

[graham.hobart]

Arc Du Soleil ??:D

[blink138]

what about infinity arcs?............ quite catchy i think!
pat

[h0ughy]

:lol::thumbsup:

[blink138]

haha graz i missed your comment!
pat

[speach]

lengths of poly pipe

[Wavytone]

Is that grass, or is that a comb-over ?

:lol:

[csb]

Beginner's croquet?