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broken line divides a polygon into 2 polygons

Source: TOT 561 1997 Autumn S A2

September 11, 2024
geometrybroken linepolygonconvex polygon

Problem Statement

Which of the following statements are true?
(a) If a polygon can be divided into two congruent polygons by a broken line segment, it can be divided into two congruent polygons by a straight line segment.
(b) If a convex polygon can be divided into two congruent polygons by a broken line segment, it can be so divided by a straight line segment.
(c) If a convex polygon can be divided into two polygons by a broken line segment, one of which can be mapped onto the other by a combination of rotations and translations, it can be so divided by a straight line segment.
(S Markelov,)