• There are two models including Point and Polygon
• Point inherits from Vector
• Polygon has some important method

  1. isConvex
     

     It will return whether the polygon is convex or convave

  2. isInside

     It will return the target point is inside polygon or not

ruby main.rb

gem install rspec
rspec

You follow rules below to customize your own test case

3     # vertices of polygon
1 2   # first point
5 9   # second point
4 7   # third point
1 2   # target point