The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the relationship between sides and angles in right-angled triangles. The hypotenuse is the ...

A right triangle is a triangle with one angle measuring exactly 90 degrees. The side opposite this right angle is known as the hypotenuse, which is the longest side of the triangle. The other two ...

The Doctrine of Triangles offers an interdisciplinary history of trigonometry that spans four centuries, starting in 1550 and concluding in the 1900s. Glen Van Brummelen tells the story of ...

Counting will get you nowhere. Try a little combinatorics instead. By Kenneth Chang A couple of weeks ago, I wrote about a viral math problem — 8÷2(2+2) = ? — that drew the disdain of many ...

Trigonometry and adventure went into the charting of India and measuring the world’s tallest mountain. Shruthi Rao and Meera Iyer recount how the historic effort began in Bengaluru.

The ancient Babylonians understood key concepts in geometry, including how to make precise right-angled triangles. They used this mathematical know-how to divide up farmland – more than 1000 years ...