All rectangles are quadrilaterals.
A quadrilateral has 4 sides;
all rectangles have 4 sides;
thus all rectangles are quadrilaterals.
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Not all quadrilaterals are rectangles. Some quadrilaterals are rectangles, and the rest are not. However, all rectangles are quadrilaterals.
Rhombuses and Rectangles
Squares, Rectangles, and Rhombuses.
A quadrilateral is any 4 sided polygon. Therefore, quadrilaterals would include parallelograms, rectangles, squares, complex quadrilaterals as well as trapezium.
No. A quadrilateral is a any closed polygon with four sides. A rectangle is a quadrilateral with four right angles and congruent opposing sides. Therefore, all rectangles are quadrilaterals, but not all quadrilaterals are rectangles.