In maths, a construction is an accurate drawing. Besides constructing triangles, there are two main constructions which can be done using a ruler, a pair of compasses and a pencil: After the ...

Many a mathematician has received a long letter from an unknown sender who claims to have found a way to trisect an angle using only a straightedge and compass. The mathematician may read passages of ...

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At one time or another, most of us have probably used a Swiss Army Knife. An excellent everyday tool, it's really just a glorified pocket or penknife; a tool incorporating several blades and other ...