1. 
If the number of sides in a polygon was doubled, the sum of its interior angles would increase by 1,260. How many sides does the original polygon have? 

2. 
What is the number of sides in a regular polygon in which the measure of an interior angle is twelve more than six times the measure of an exterior angle? 

3. 
What is the measure of each interior angle in a regular hexagon?
    144  
    120  
    210  
    90  
    120  


4. 
How many diagonals can be drawn inside of a heptagon?
    14  
    1  
    7  
    13  
    None of the above  


5. 
Polygon P has t sides. How many diagonals can be drawn inside of polygon P?
    4 (t  2)  
    t(t  3) ÷ 2  
    2 (t)  
    t(t  2) ÷ 3  
    t(t  2) ÷ 2  
    t(t  2)  


6. 
If the sum of the measures of polygon is 2160, how many sides does the polygon have?
    24  
    17  
    11  
    20  
    21  
    14  


7. 
Each point of a polygon at which two sides intersect is called ___________.
    a side  
    a vertex  
    exterior angle  
    interior angle  
    diagonal  


8. 
Polygon C has h sides. What is the sum of the measures of polygon's C interior angles?
    h(h  3) ÷ 2  
    180 (h  2) ÷ 2  
    360 (h  2)  
    90 (h  4)  
    180 (h  2)  

