sparknotes
Geometric Surfaces
Problems
Problem : What must be true of a surface in order for it to be a simple closed surface?
Problem : If a line is perpendicular to a plane, is that line perpendicular to every line in the plane?
Problem : What must be true of a surface in order for it to be a simple closed surface?
Problem : If a line is perpendicular to a plane, is that line perpendicular to every line in the plane?
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