Short Test _Angles properties, Polygon and Equation involving Fractions

 

Comment:

Q1 : Please take note of the comments that I have written in RED.

Q2 : Please use SHORTEST method to find the required angles.

        For instant, to find r, use corresponding angles of // lines directly instead of alternate angles of 

         parallel lines followed by vertically opposite angles. 

 

Comment:
Try to make use of exterior angle method to find the number of sides of a regular polygon.
Presentation wise, for either method, you are expected to FORM an equation and then solve it to find the number of sides.