A right triangle
is a that has one . The side opposite the right is always the longest and is known as the hypotenuse
. The other sides are commonly called legs
. Notice that in a right triangle, the legs are to each other.
If one of the in the triangle is labeled, the legs can be discussed relative to that angle. Consider an acute angle labeled as
on the diagram. The side that forms the angle is the adjacent side
and the side not touching the angle is the opposite side
Note that the opposite and adjacent sides change when
changes, but the hypotenuse is always the same.