Quadrilaterals

Mathematics — First Preparatory

Special quadrilaterals

Comparison aspect	Main idea	Keywords
Parallelogram	each pair of opposite sides is parallel and equal each pair of opposite angles is equal consecutive angles are supplementary and the diagonals bisect each other	pairoppositesidesequal
Rectangle	a parallelogram with four right angles. Its diagonals are equal	parallelogramfourrightangles
Rhombus	a parallelogram with four equal sides. Its diagonals are perpendicular and each one bisects a pair of angles	parallelogramfourequalsides
Square	a rectangle with four equal sides. It is also a rhombus and its diagonals are equal and perpendicular	rectanglefourequalsides
Trapezium	a quadrilateral with only one pair of parallel sides. It is called isosceles when its two non-parallel sides are equal	quadrilateralpairparallelsides
Kite	a quadrilateral in each pair of adjacent sides is equal. Its diagonals are perpendicular	quadrilateralpairadjacentsides

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