Perimeter of regular polygon, how many sides?

Question

The perimeter of a different regular polygon is 100b – 20
The length of one of its sides is 10b – 2. How many sides does this regular polygon have?

 

How do you show the working of this please?

Answer 1

The perimeter of a different regular polygon is 100b – 20
The length of one of its sides is 10b – 2.

 

no. of sides of regular polygon = perimeter/ length of 1 side

 

                                             =(100b-20)/(10b-2)

 

                                              =10(10b-2)/(10b-2)

 

 

                                              =10

number of sides =10