sorry, but in another effort to kill the thread, I feel it would be rude not to give you another They Might Be Giants song entitled "The secret life of six"
"The secret life of 6, is having fun
When everyone's asleep, he's in the sun
6 knows how to stand on his head,
6 knows how to stand on his head
And when 6 pretends he's 9
he feels older and wiser"
and I won't stop till you leave the poor old teacher alone. I got grade A at maths A level in the 80's and didn't need to know the right name for a 7-sided polygon to do any of the actual maths. In fact, why do we bother teaching the names of shapes with more than 6 sides anyway? It's pretty obscure stuff. You can do the maths without it.....maybe it gives those who can spell but can't do maths a feeling of REVENGE.....