Quadrilaterals and their Properties
Quad means four and lateral means sides. A quadrilateral is a 2-dimensional closed shape with four sides and four vertices (corners). The sum of the interior angles of a quadrilateral is 360°.
A line segment drawn from one vertex to the opposite vertex is called a diagonal. AC and BD are the diagonals of the quadrilateral ABCD shown above.
The table below shows the types of quadrilaterals and their properties.
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