9000121808

SubArea: 
Polygons
Level: 
B
Project ID: 
9000121808
Source Problem: 
2010018003
Accepted: 
1
Clonable: 
1
Easy: 
0
The number of diagonals in a polygon is three times bigger than the number of sides of this polygon. Find the number of vertices of this polygon.
9
12
6
15