Educational Jokes My Kids Rejected

It's almost time to start school again, and to get my kids in the mood, I made up a bunch of math jokes. They banished me from the room for it. Tell me ... was it deserved?

How do shapes get to school?

They ride the rhombus.

What's the hardest-working shape?

The triangle.

What's the most noble shape?

The circle.

Which shape is the most accident prone?

The rectangle.