(1) A trapezoid is isosceles if and only if the base angles are congruent. (2) A trapezoid is isosceles if and only if the diagonals are congruent. (3) If a trapezoid is isosceles, then its opposite angles are supplementary. Kites. Definition: A kite is a quadrilateral with two distinct pairs of adjacent sides that are congruent.
The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogramare of equal measure." -- Formal definition of Parallelogram. Whereas Trapezoid has only one pair of parallel sides. Thus, we can say Trapezoid is not a Parallelogram.
Diamond, Rhombus vs Trapezoid Diamond, Rhombus, and Trapezoid are all quadrilaterals, which are polygons with four sides. While rhombus and trapezium are properly defined in mathematics, diamond (or diamond shape) is a layman’s term for rhombus. Rhombus and Diamond. A quadrilateral with all sides equal are in length is known as a rhombus.