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Old Nov 4, 2010, 11:28 AM   #1
FourCandles
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What is this shape called?

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:

Name:  Circle-Square.png
Views: 2274
Size:  8.7 KB

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.
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Old Nov 4, 2010, 11:50 AM   #2
lucidmedia
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Quote:
Originally Posted by FourCandles View Post
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:

Attachment 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/...-arts-council/
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Old Nov 4, 2010, 11:57 AM   #3
FourCandles
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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.
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Old Nov 4, 2010, 11:57 AM   #4
eellingb
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The closest I could figure is a teardrop, though the point isn't up on your example.
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Old Nov 4, 2010, 01:03 PM   #5
manueld
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looks like a teardrop/water drop to me.
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Old Nov 4, 2010, 01:07 PM   #6
autacraft
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no idea what its called, but have lots of derivatives (including this actual shape itself) in illustrator if anyone wants.

PM me
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Old Nov 4, 2010, 02:14 PM   #7
FourCandles
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Quote:
Originally Posted by eellingb View Post
The closest I could figure is a teardrop, though the point isn't up on your example.
Quote:
Originally Posted by manueld View Post
looks like a teardrop/water drop to me.
I think technically the teardrop is a different mathematical shape - see here 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.


Quote:
Originally Posted by autacraft View Post
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.
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Old Nov 4, 2010, 04:18 PM   #8
autacraft
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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!
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Old Nov 4, 2010, 04:25 PM   #9
autacraft
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here you go:
Attached Thumbnails
Click image for larger version

Name:	Screen shot 2010-11-04 at 21.24.29.png
Views:	75
Size:	43.0 KB
ID:	258793  
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Old Nov 4, 2010, 07:07 PM   #10
ezekielrage_99
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It's called a squarcle or ciquare
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Old Nov 4, 2010, 07:43 PM   #11
SidBala
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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
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Old Nov 5, 2010, 06:22 AM   #12
SChristy
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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
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Old Nov 5, 2010, 09:11 AM   #13
chrono1081
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Originally Posted by SidBala View Post
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 )
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Old Nov 6, 2010, 02:37 AM   #14
SidBala
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Originally Posted by chrono1081 View Post
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.
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