sitifan Is a "flat surface" the same thing as a "plane surface"? Yes, but plane has more of the idea of artificially flattened, or a mathematical surface. sitifan Must a flat surface be also level?
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sitifanIs a "flat surface" the same thing as a "plane surface"?Yes, but plane has more of the idea of artificially flattened, or a mathematical surface.
sitifan Must a flat surface be also level?Yes, but flat and level are not always interchangeable. "Level" can have the additional idea of being horizontal.