Given a regular polygon with five sides, how many congruent triangles can you dissect the polygon into using the center point and two adjacent vertices of the polygon? How about a regular polygon with seven sides or ten sides?

You coordinate volunteers for litter cleanup in local parks. your spreadsheet lists drivers and the number of seat belts in each driver’s car. the spreadsheet calculates the number of drivers (d) and the total number of seat belts (s). you want to know the maximum number of volunteers, besides drivers, that can be transported to the park in a single trip given that each person must have a seat belt of their own.