A closed rectangular region covers a family of figures if it contains a congruent copy of each figure in the family. We call such a region a box for the family. A 'worm problem' for that family is to find the box of smallest area. Suppose X is a bounded convex set of points in the plane. For each direction, 0, 0 < 0 < Jt, let w(0) be the width of X in the direction 0, i.e., the distance between the two support lines of X perpendicular to the direction 0. The maximum of w(0) is called the diameter of X. The minimum of w (0) is called the breadth (or thickness) of X. In the case of a triangle, the diameter is the length of the longest side, and the breadth is the length of the shortest altitude, the altitude to the longest side. As far as a triangle of diameter 1 is concerned, the shortest altitude is as large as possible when the triangle is equilateral. Since the equilateral triangle with side length 1 has altitude £V3, it is easy to see that the breadth of a triangle of diameter one is at most £V3. In this paper we shall find the smallest box
A closed rectangular region covers a family of figures if it contains a congruent copy of each figure in the family. We call such a region a box for the family. A 'worm problem' for that family is to find the box of smallest area. Suppose X is a bounded convex set of points in the plane. For each direction, 0, 0 < 0 < Jt, let w(0) be the width of X in the direction 0, i.e., the distance between the two support lines of X perpendicular to the direction 0. The maximum of w(0) is called the diameter of X. The minimum of w (0) is called the breadth (or thickness) of X. In the case of a triangle, the diameter is the length of the longest side, and the breadth is the length of the shortest altitude, the altitude to the longest side. As far as a triangle of diameter 1 is concerned, the shortest altitude is as large as possible when the triangle is equilateral. Since the equilateral triangle with side length 1 has altitude £V3, it is easy to see that the breadth of a triangle of diameter one is at most £V3. In this paper we shall find the smallest box
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