Learn activities for kindergarten grade math to prepare for school. Teach your children kindergarten math skills like counting and understanding numbers.

Researchers taught honeybees math skills, revealing that the animals' tiny brains are more capable than we previously thought.

I'm talking about trigonometry, of course: that bastion of angles and triangles that is essential to calculating velocity, momentum, and much more.

A version of this article appears in print on Aug. 27, 2019, Section D, Page 3 of the New York edition with the headline: How Many Triangles? Count on Math to Help.