PDA

View Full Version : What is this shape called?




FourCandles
Nov 4, 2010, 11:28 AM
I need look into the usage of a particular shape/design, and I really need to know what itís called - if it has a name - before I can even search for it.

Hereís a quick sketch:

258733

So, itís formed from a circle, and overlaid with a square with the length of the sides equal to the radius of the circle, so that the corner of the square is at the centre of the circle.

However, Itís not in any of the lists of geometric shapes that Iíve seen, maybe because itís not a geometric shape with an equation to produce it.

Does anyone know if thereís a name for this shape? Many thanks.



lucidmedia
Nov 4, 2010, 11:50 AM
I need look into the usage of a particular shape/design, and I really need to know what itís called - if it has a name - before I can even search for it.

Hereís a quick sketch:

258733

So, itís formed from a circle, and overlaid with a square with the length of the sides equal to the radius of the circle, so that the corner of the square is at the centre of the circle.

However, Itís not in any of the lists of geometric shapes that Iíve seen, maybe because itís not a geometric shape with an equation to produce it.

Does anyone know if thereís a name for this shape? Many thanks.

I am not sure what its proper name is, but it has quite a history!

I am thinking of the whole "new quark" logo that had to be changed because of copyright infringement issues:

http://inko9nito.wordpress.com/2007/10/16/quark-vs-scottish-arts-council/

FourCandles
Nov 4, 2010, 11:57 AM
That's a great link, I see there's lots of other usage of the shape and its derivatives in the article too. Many thanks.

eellingb
Nov 4, 2010, 11:57 AM
The closest I could figure is a teardrop, though the point isn't up on your example.

manueld
Nov 4, 2010, 01:03 PM
looks like a teardrop/water drop to me.

autacraft
Nov 4, 2010, 01:07 PM
no idea what its called, but have lots of derivatives (including this actual shape itself) in illustrator if anyone wants.

PM me

FourCandles
Nov 4, 2010, 02:14 PM
The closest I could figure is a teardrop, though the point isn't up on your example.

looks like a teardrop/water drop to me.

I think technically the teardrop is a different mathematical shape - see here (http://mathworld.wolfram.com/TeardropCurve.html) for the equation - and I donít think you can have a value of m in that equation that will give the perfectly straight sides (as you can gather Iíve re-learnt a lot of geometry just recently!). But thanks for the replies.


no idea what its called, but have lots of derivatives (including this actual shape itself) in illustrator if anyone wants.
...

Thanks - I've created it OK, but that's then triggered the questions about prior usage that prompted my thread.

autacraft
Nov 4, 2010, 04:18 PM
There is an equation you can use to create this shape, but I'll leave the working out to you ;-)

Heres a diagram that will help!

autacraft
Nov 4, 2010, 04:25 PM
here you go:

ezekielrage_99
Nov 4, 2010, 07:07 PM
It's called a squarcle or ciquare ;)

SidBala
Nov 4, 2010, 07:43 PM
I don't know anything about illustrator. But I know about math.

You can make this curve from multiple piecewise curves. Basically a 3/4th circle and 2 lines.

Yeah you figure out those equations ;)

SChristy
Nov 5, 2010, 06:22 AM
I've searched wikipedia but I couldn't find anything looking like this...Actually I think that there is not an official name for this shape.The only information I was able to find is just the mathematical way you can shape it.I hope I helped you a bit:-)

Click here (http://commons.wikimedia.org/wiki/File:Tangent-unit-circle-triangle.svg)

chrono1081
Nov 5, 2010, 09:11 AM
I don't know anything about illustrator. But I know about math.

You can make this curve from multiple piecewise curves. Basically a 3/4th circle and 2 lines.

Yeah you figure out those equations ;)

Pfft! Maple will figure it out for me! (I don't know enough math to use Mathematica :P )

SidBala
Nov 6, 2010, 02:37 AM
Pfft! Maple will figure it out for me! (I don't know enough math to use Mathematica :P )

Why even that? A simple pen and paper + 2000 year old math is enough to do this.