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how many sides does a regular polygon have that has an angle of rotation equal to 20°? How many lines of symmetry will it have

Sagot :

Since a full rotation would be 360 degrees, you divide that by 20 degrees, which equals 18. So, this polygon will have 18 sides. 

Since a regular polygon will have the number of sides equal to the lines of symmetry, there will also be 18 lines of symmetry.