Learn about three trigonometric ratios in similar right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

Trigonometry is a branch of mathematics that studies relationships between the sides and angles of triangles. Trigonometry is found all throughout geometry, as every straight-sided shape may be ...

With all due respect to Pythagoras, newly uncovered evidence suggests that his famous theorem, used to calculate the lengths of each side of a right triangle, might be 1,000 years older than him ...

A 3,700-year old Babylonian clay tablet reveals an ancient method of constructing right-angled triangles that makes it the world’s oldest and most accurate trigonometric table.

"Our research reveals that Plimpton 322 describes the shapes of right-angle triangles using a novel kind of trigonometry based on ratios, not angles and circles," says Mansfield.

The 15 rows on the tablet describe a sequence of 15 right-angle triangles, which are steadily decreasing in inclination. The left-hand edge of the tablet is broken and the UNSW researchers build ...

This suggests that Plimpton 322 describes the shapes of right-angle triangles using a novel form of trigonometry based on ratios, rather than angles or circles.

The new research shows the Babylonians beat the Greeks to the invention of trigonometry -- the study of triangles -- by more than 1,000 years. Advanced Search Home ...

Learn about three trigonometric ratios in similar right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.