标签：straight

Did you know that any straight-line drawing on paper can be folded so that the complete drawing can be cut out with one straight scissors cut? That there is a planar linkage that can trace out a...

标签：anycutdrawingfoldinggeometricobjectspaperpolyhedrastraight

A perennial bestseller by eminent mathematician G. Polya, "How to Solve It" will show anyone in any field how to think straight. In lucid and appealing prose, Polya reveals how the mat...

标签：anydemonstratinghowmathematicalmethodpolyaproblemsolvestraight