Trapezoid that has at least one right angle.
Properties
- Since a line d perpendicular to a line e is also perpendicular to all the lines parallel to e, then, if a trapezoid has at least one right angle, it always has at least two.
- The adjacent angles of an isosceles trapezoid that are not right angles are supplementary angles.
Example
This is a right trapezoid with right angles A and D :
