Lesson#20 Classification of Quadrilateral (2) TRAPEZIUM: A quadrilateral having at-least one pair of parallel sides. It is called Trapezoid in US. PROPERTIES: 1. Adjacent angles are supplementary. SPECIAL CASES: >> A trapezium having equal diagonals is called an isosceles trapezium. A trapezium having two pairs of parallel sides is called parallelogram. A trapezium having one right angle is called a right trapezium. Introduction to Analytical Geometry chapter No 4 Exercise No 4.1 mathematics part 2
