Save guides, add subjects and pick up where you left off with your BBC account. The sides of right-angled triangles are labelled opposite, hypotenuse and adjacent. Trigonometry explores the ...

Trigonometry Formulas: There are very few topics ... deals with the study of the relationship between sides and angles of a right triangle. It’s used in astronomy, cartography, geography ...

which states that "in a right-angled triangle the square of the hypotenuse is equal [to the sum of] the squares of the two other sides." Contrary to what generations of pupils have learned in high ...