The humble triangle has been with us from the ancient pyramids to the modern days, being one of the most recognizable, interesting, and useful shapes in geometry. Ancient mathematicians laid the ...

An illustration of a magnifying glass. An illustration of a magnifying glass.

A scalene triangle has 3 sides of different lengths and 3 unequal angles. An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the ...

Genocript, Zama-shi, Kanagawa, Japan. Discrete differential geometry studies discrete equivalents of the geometric notions and methods of differential geometry, such as notions of curvature and ...

A scalene triangle has 3 sides of different lengths and 3 unequal angles. An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? This triangle brain teaser isn’t new—shoutout to Popsugar for unearthing it a couple ...

Tucked away in a seemingly forgotten corner of the Istanbul Archaeology Museum, Daniel Mansfield found what may solve one of ancient math’s biggest questions. First exhumed in 1894 from what is now ...