what shape has no corners and 1 side?

[farriermatt]

as above ...what shape has no corners and 1 side? this has come up in my daughters homework i think its a circle but no one agrees with me am i wrong?

[JoolsTwo]

How about a Sphere?

[dr john]

The best-known shape with one side is a Moebius strip, which also has no corners (even a sphere has an inside + an outside).

http://www.cut-the-knot.org/do_you_know/moebiu s.shtml

[Muffet]

Circle seems best. After all, we don't say a triangle has six sides.

[kev100]

Wont do Muffet, a circle has two sides, inside and outside

[farriermatt]

Thanks everyone..i love the mobius strip! but she is only 6 and her teachers might have been a bit surprised by that...they were happy with circle and no one else got it apparently ..inside and outside i had nt thought of that..i am going to like this site!

[mintsweet13]

i think its a circle can't think of anything else