How many lines of symmetry does a regular polygon with x sides have

There are actually 2 variations in this case.

> First case: the number of sides is an odd number

                The number of lines of symmetry is simply equal to number of sides

> Second case: the number of sides is an even number

                The number of lines of symmetry is equal to twice the number of sides

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system