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Using computers to solve geometric problems. Questions with this tag should typically have at least one other tag indicating what sort of geometry is involved, such as ag.algebraic-geometry or mg.metric-geometry.

3 votes
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Determining if a polygon is convex using relations on orientation of each ordered triple of ...

It's important to note that when it talks about ordered points, this is ordered by $x$-coordinate and not (as one might otherwise suppose) by traversing the edges of the polygon. Suppose we have $n$ p …
Peter Taylor's user avatar
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3 votes

Partition of polygons into 'congruent sets of polygons'

By the Wallace-Bolyai-Gerwien theorem it suffices to cut the polygon into $n$ sets of equal area, which can certainly be done by continuity of the area on one side of a line as you move the line acros …
Peter Taylor's user avatar
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1 vote
Accepted

On triangulations and "coverage" of circumcircles

It's sufficient to prove $D(\triangle abc) \subseteq D(\triangle abd) \cup D(\triangle bcd)$ by symmetry under permutation of the labels $b,d$. Divide the circumcircle of $abc$ into three arcs: $\frow …
Peter Taylor's user avatar
  • 7,226