Can you count all the triangles in these images? (Hint: There are more than you think.)

Gordon Burgin triangles

Number of Triangles? Gordon Burgin

We know you are bored at home right now—we are too. Here are some puzzles and brainteasers to challenge your family and friends with, either in person or over video chat.

Whether it’s a simple square or a wonky equilateral, every polygon contains multitudes. These shapes are no different; each has dozens of smaller geometric units nested inside. Can you count them all?

For a high-res printable version: Click here

To see the answers: Click Here

This article was originally published in the Summer 2019 Make It Last issue of Popular Science.