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A figure has rotational symmetry if it can be rotated about a point less than a full turn and look the same as it did before the rotation.
The order of rotational symmetry is the number of times a figure looks the same as it did originally when it is rotated through 360°.
For example: Consider this figure.
If we rotate it one-half turn, it will look the same.
So, it has rotational symmetry.
Also, observe that when the figure is rotated through 360°, it looks the same two times.
So, this figure has rotational symmetry of order 2.
Even if a figure has no rotational symmetry, the order of rotational symmetry will still be 1 as every figure looks the same at the end of a complete rotation (360°).
For example: Consider this figure.
The order of rotational symmetry of this figure is 1.
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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.
21,27,23
21 is the smallest number.
