Right triangle  From Wikipedia, the free encyclopedia Jump to:
navigation, search Right triangle  A right triangle (American
English) or right-angled triangle (British English) is a
triangle in which one angle is a right angle (that is, a
90-degree angle). The relation between the sides and angles of a
right triangle is the basis for trigonometry.  The side opposite
the right angle is called the hypotenuse (side c in the figure).
The sides adjacent to the right angle are called legs (or
catheti, singular: cathetus). Side a may be identified as the
side adjacent to angle B and opposed to (or opposite) angle A,
while side b is the side adjacent to angle A and opposed to
angle B.  If the lengths of all three sides of a right triangle
are integers, the triangle is said to be a Pythagorean triangle
and its side lengths are collectively known as a Pythagorean
triple.  Principal properties[edit]   As with any triangle, the
area is equal to one half the base multiplied by the
corresponding height. In a right triangle