how many limes of symetry are found in a regular polygon with 20 sides a.20 b.40 c.60 d.80
The number of lines of symmetry in a regular polygon can be determined by the formula: number of lines of symmetry = number of sides / 2.
Using this formula, we can determine the number of lines of symmetry in a regular polygon with 20 sides:
Number of lines of symmetry = 20 / 2 = 10
Therefore, the correct answer is a. 10.