- GEOMETRIC SHAPES
REGULAR AND IRREGULAR POLYGONS
Regular and Irregular Polygons
A polygon is regular, if all its sides have the same length and all its angles have the same measure.
A polygon is irregular, if it is not regular.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.