A quadrilateral is a polygon which has 4 sides.
There are different kinds of quadrilaterals. Their characteristics enable us to tell them apart.
There are other kinds of quadrilaterals without a specific name. They are called irregular quadrilaterals.
Examples:
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The square is a convex polygon. |
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It has 2 pairs of parallel sides. |
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Its 4 sides are the same length (isometric). |
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It has 4 right angles. |
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The rectangle is a convex polygon. |
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It has 2 pairs of parallel sides. |
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Its opposite sides are the same length (isometric). |
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It has 4 right angles. |
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The rhombus is a convex polygon. |
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It has 2 pairs of parallel sides. |
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Its 4 sides are the same length (isometric). |
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Its opposite angles are congruent (isometric). |
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The parallelogram is a convex polygon. |
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It has 2 pairs of parallel sides. |
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Its opposite sides are the same length (isometric). |
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Its opposite angles are congruent (isometric). |
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The trapezoid is a convex polygon. |
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It has 1 pair of parallel sides. |
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