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.

What's the better way to cut your sandwich—into triangles or rectangles? What shape gives you MORE sandwich? Use math to definitively solve the sandwich debate.

This is the trickiest math riddle about how many triangles you see that only geniuses can solve. Can you?

One teacher was looking for a way to help his students have more fun with math and logic. So he developed what is now known as the perimeter magic triangle puzzles.

A high school teacher didn't expect a solution when she set a 2,000-year-old Pythagorean Theorem problem in front of her ...

We spent forever arguing about the brain teaser that asks: How many triangles do you see? Here, mathematicians reveal the real answer. See if you’re right.

Math Riddles: Today, we have another math puzzle to test your aptitude and IQ level. Can you find the total number of triangles in this picture puzzle which is designed to strengthen your logical ...

Yet another viral math equation is taking over the internet. This time, it's a pink triangle within a square that has people scratching their heads. Can you solve it?