Interesting Engineering on MSN

New knitting machine weaves solid 3D forms, adding stitches in any direction

A team from Cornell and Carnegie Mellon has created a knitting machine that constructs solid 3D shapes by adding stitches in ...
PBS

Solid Shapes

(cheerful music) (electronic gadgets whirring and ringing) - [Children] Math Mights! Welcome, 2nd grade Math Mights. My name is Mrs. McCartney. I'm so excited that you've joined us today for our show.
BBC

Sort 2D and 3D shapes

Two-dimensional (2D) shapes are completely flat. They cannot be picked up. A polygon is a 2D shape with straight sides that meet at vertices. Polygons have names that show the number of sides they ...