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quadrilateral

Quadrilateral  
Part of the National cirriculum

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Plane (two-dimensional) figure with four straight sides. The sum of all interior angles is 360°. The following are all quadrilaterals, each with distinguishing properties: square with four equal angles and sides, and four axes of symmetry; rectangle with four equal angles, opposite sides equal, and two axes of symmetry; rhombus with four equal sides, and two axes of symmetry; parallelogram with two pairs of parallel sides, and rotational symmetry; kite with two pairs of adjacent equal sides, and one axis of symmetry; and trapezium with one pair of parallel sides.

© RM 2009. Helicon Publishing is division of RM.


 
 

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