For example in the figure above the cosine of x is the side adjacent to x labeled a over the hypotenuse labeled h. 5 c 2. Sine Cosine Tangent Explained And With Examples And Practice Identifying Opposite Adjacent Sides And Hypotenu Mathematics Education Gcse Math Studying Math The right triangle below shows θ and the ratio of its opposite side to its adjacent side. . A for angle x. Full curriculum of exercises and videos. CosA B cosAcosB sinAsinB. The opposite is the side that does not form the angle of choice. The hypotenuse is the longest side of the right-angled triangle opposite to right angle which is adjacent to base and perpendicular. Then the hypotenuse formula from the Pythagoras statement will be. Therefore if a is the base b is the perpendicular and c is the hypotenuse in a right angled triangle then. This web site contains over a thousand free mathematical activities for teachers and pupils. Fo