The document discusses different types of shapes. It defines two groups of shapes: closed figures with more than 3 sides like polygons; and open figures where the number of angles is not equal to the number of sides. It then focuses on polygons, defining them as closed figures with 3 or more sides where the number of sides equals the number of angles. Examples of polygons provided include triangles with 3 sides, quadrilaterals with 4 sides, and polygons with 5 to 10 sides such as pentagons, hexagons, heptagons, octagons, nonagons, and decagons. The document also mentions concave polygons as a type of polygon with indentations.
7. Group1
? Figures are closed
? Have more than 3 sides
? Number of angles equal to number of sides
Group 2
? Figures are open
? Number of angles not equal to number of sides
