o c and co possibly American
quipu
Quipa.
A rope knotted every cubit.
The quipa rope is actually just a knotted rope and it was used for counting in some countries
a tribe of hunter-gatherers who used pottery and rope for art
I think they might have done rope pottery? I might be confusing that with my Japanese history...
Jōmon pottery is accepted to be the oldest known Japanese pottery. It is a rope pattern, and is as old as 10000 BCE.
Cornrows are very tight plaits. Dreadlocks are knotted, matted hair that form into rope-like locks.
Apples work somewhat but rawhide or a heavy knotted rope work better to clean a dogs' teeth.
A tribe of hunter-gatherers who used pottery and rope for art
It doesn't. It could be an equilateral triangle, with 4 equal intervals on each side.You're thinking of a right triangle with sides in the ratio of [3 to 4 to 5], with a sum of 12.Actually, I think it could be a triangle of anyshape. Any triangle can be inflated or deflated,keeping its shape so that all versions of it are similar, until its perimeter is 12.
A knot