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A single drawing of a solid hides information, so problems give you two or three flat views instead. Each view tells you the maximum height along one direction; putting them together pins down the shape, or shows that several shapes fit.
Saved in this browser only. No account, nothing sent anywhere.
Nothing yet. No other skill in the Atlas lists this one as a prerequisite.
No indexed official paper question has been tagged with GEO-12 yet. The index grows one paper at a time, and it records only question numbers, point values and our own skill tags — never the problems themselves.