Don’t bother to count the sides.
Don’t try to think of what prefix to use.
I learned the “correct” answer from other parents who pulled their children out of school for homeschooling.
If you thought this was an octagon, I’m sorry to say that you were way off.
It’s a stop sign, of course.
Even though it’s not red.
Even though it doesn’t have the word STOP anywhere on it.
If your kids watched Mickey Mouse Clubhouse or Team UmiZoomi in preschool, this could be a little confusing, since those preschool shows actually use the technically correct words for these shapes (Mickey even teaches the names of 3D shapes).
Maybe those words become more challenging when the kids enter kindergarten.
All I can say is:
Please, oh please, octagon teaching our kids the wrong words!
Octagon it!
Between this and my previous post, I know we’ve said enough and have probably said too much.
Perhaps this merits a moment of silence instead…
chrismcmullen 
Wait. People actually call it ‘stop sign’ instead of ‘octagon’? Why?
Evidently, this is what the kindergarten curriculum prescribes. It’s just as much a mystery to me. 🙂
Does a kid skip a grade if he knows octagon? My son already knows Dodecahedron. Thank you, Team Umizoomi.
Your son has my vote. I love dodecahedra. How is going to role play and become a fantasy writer like his dad without knowing that word? 🙂
The most ignored die of the set.
Stop sign…
I cannot say what comes to mind right now and remain polite.
No need. I’m feeling very telepathic right now. 🙂