The Course Blog for Math 125 at Wheaton College in Norton, Massachusetts for the fall term of 2014.
This wallpaper pattern seems to have 90 degrees of rotational symmetry with reflections in two directions and the rotation centers on the reflection lines. So that makes this a pmm wallpaper pattern.
This wallpaper pattern seems to have 90 degrees of rotational symmetry with reflections in two directions and the rotation centers on the reflection lines. So that makes this a pmm wallpaper pattern.
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