Do two adjacent angles share a common vertex? Can vertical angles every qualify as adjacent angles? We have answers to these questions and more in this handy guide. Olena Ruban / Getty Images ...

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 ...

What we called “rise” in the above example is taken as length of the opposite leg to the angle of interest; likewise, the “run” is taken as the length of the adjacent leg. When applied to ...