Name of a geometrical shape


by xaratustra
Tags: geometrical, shape
xaratustra
xaratustra is offline
#1
Nov26-13, 04:59 AM
P: 29
What is the geometrical shape called, when combining 3 ellipses together, such that each two share one focal point and together form a kind of 60 degree triangular shape?

It will look similar to Reuleaux triangle, but it is not formed out of a triangle, but 3 ellipses, as if you are gluing one ellipse to each side of a triangle.

thanks
Phys.Org News Partner Mathematics news on Phys.org
Researchers help Boston Marathon organizers plan for 2014 race
'Math detective' analyzes odds for suspicious lottery wins
Pseudo-mathematics and financial charlatanism
xaratustra
xaratustra is offline
#2
Nov26-13, 05:44 AM
P: 29
I think it is called a superellipse. I found a formula and an octave program on Wikipedia. The one I was looking for is the one with parameters "3 6 6 6", the table on the right side. The plot in octave also works by using the following command:
sf2d([3 6 6 6],[1 1])
anyway, thanks.


Register to reply

Related Discussions
Assuming Complex Shape a Simple Shape. What is this called? Differential Geometry 2
Conversion from 'Shape*' to non-scalar type 'Shape' requested Programming & Computer Science 10
Representing a point in an n-dimensional space in a 2D geometrical shape Differential Geometry 0
what's differance between J-shape cure & S-shape curve Biology, Chemistry & Other Homework 1
Shape Shape-shifting strings... solids, liquids, and gasses Beyond the Standard Model 2