Answer:
The number of sides a polygon equal to the number of vertices for that polygon.
Explanation:
To prove the number of sides equal to the number of vertices
Triangle
Number of sides = 3
Number of angles = 3
Rectangle
Number of sides = 4
Number of angles = 4
Pentagon
Number of sides = 5
Number of angles = 5
.
.
.
Decagon
Number of sides = 10
Number of angles = 10
Therefore for any polygon the number of sides is equal to number of vertices.