In Euclidean plane geometry, a pseudotriangle (pseudo-triangle) is the simply connected subset of the plane that lies between any three mutually tangent convex sets. Thus, it is a shape bounded by three inward-curved sides, formed by the boundaries of these three convex sets.
In Euclidean plane geometry, a pseudotriangle (pseudo-triangle) is the simply connected subset of the plane that lies between any three mutually tangent convex sets. Thus, it is a shape bounded by three inward-curved sides, formed by the boundaries of these three convex sets.
Source: Wikipedia "Pseudotriangle" · CC BY-SA 4.0
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