Circle, triangle, and square. They’re simple, geometric, and eerily familiar. They look like something pulled straight out of a PlayStation controller or a childhood game of tic-tac-toe.

Image caption, STEP 2: Place the compass at the point where the two arcs meet and draw a circle. Place the compass ... giving you a square. Image caption, Use a pen to draw a dot where the arcs ...

Inside a barn, three people start to sing a song and dance. ALL: (singing) A square and a rectangle, a circle and a triangle. A square and a rectangle, a circle and a triangle. BOY: If you’re ...