- if you join all the vertices of a heptagon, how many quadrilaterals will you get?
- How many heptagons can be drawn by joining the vertices of a polygon with 10 sides?
- A polygon has 20 diagonals,how many sides does it have ? Are there are formula showing relation between diagonal and no of sides of a polygon?
These two questions are similar. Any clues to help me solve the problem.