Regular polygons have as many lines of symmetry as sides. An equilateral triangle has 3, a square has 4, a regular pentagon has 5, a regular hexagon has 6, and so on, up to the n-gon.
Class 6 NCERT Ganita Prakash Chapter 9 Symmetry
class 6 Mathematics Textbook Chapter 9 question answer
In Chapter 1, Table 3, the regular polygons are classified based on their number of sides, and their lines of symmetry correspond to the number of sides. For instance, an equilateral triangle has 3 lines of symmetry, a square has 4 lines of symmetry, and a regular pentagon has 5 lines of symmetry. The number of lines of symmetry increases with the number of sides, with a regular n-gon having exactly n lines of symmetry.
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