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Answer:
Step-by-step explanation:
A regular nonagon has vertices that are 360°/9 = 40° apart. Any rotation by a multiple of 40° will make the figure indistinguishable from the original.
Rotational symmetry of 40° applies.
Rotational symmetry of 200° applies.
Answer:
Wavelength
Step-by-step explanation:
The picture below is an example of a wavelength which is very similar.
Is this multiple problems..?