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Lines of Symmetry in Polygon
Lines of Symmetry in a Rectangle: Definition, Examples, Facts
Parallelogram Lines of Symmetry Explained! — Mashup Math
Symmetry group of rectangular cuboid - Mathematics Stack Exchange
Straight line rectangle - ネックレス
Lines of Symmetry in Rectangle (Definition and Order)
Lines of symmetry of a rectangle
Rotational Symmetry & Reflection of Polygons - Lesson
How can the lines of symmetry of a rectangle be described? - Quora
Symmetry in Math, Definition, Types & Examples - Lesson