New work on the problem of “scissors congruence” explains when it’s possible to slice up one shape and reassemble it as another. If you have two flat paper shapes and a pair of scissors, can you cut ...

Hunt for shapes and make familiar objects by putting together several different shapes. Warm up with a Mystery Math Mistake to tell whether Dotson's 10-frames represent a number more than his focus ...

Did you know there are several types of lip shapes? For too long, I didn’t either. But as it turns out, knowing how to find yours can be a super-useful beauty tool. As a result, she’s seen fewer trend ...

If you have two flat paper shapes and a pair of scissors, can you cut up one shape and rearrange it as the other? If you can, the shapes are “scissors congruent.” But, mathematicians wonder, can you ...