Watch the video below which is all about polygons. Polygons are 2D shapes with 3 or more straight sides. All quadrilaterals are polygons, but there are other types of polygons too. As you can see ...
Look at how these shapes have been sorted. Remember a quadrilateral is any shape with 4 straight sides. Now the shapes have been sorted using a Venn diagram. What is special about the square?
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