

1. 
The sum of the measures of the angles of a regular octagon is 1,080°. Find the measure of one of its angles. 


A. 
108° 
B. 
90° 


C. 
120° 
D. 
135° 


Hint 


2. 
Which of the following angle measures represent the angles of a regular polygon that can be used to make a tessellation? 


A. 
135° 
B. 
144° 


C. 
150° 
D. 
90° 


Hint 


3. 
In a tessellations with squares and regular triangles, two squares touch each vertex. How many triangles touch each vertex? 


A. 
3 
B. 
1 


C. 
2 
D. 
4 


Hint 


4. 
What is the name of a polygon that has seven sides? 


A. 
nonagon 
B. 
heptagon 


C. 
hexagon 
D. 
octagon 


Hint 


5. 
The sum of the angle measures of a regular hendecagon (an 11sided polygon) is 1620°. What is the measure of each of the angles of the hendecagon? Round your answer to the nearest whole degree. 


A. 
90° 
B. 
144° 


C. 
150° 
D. 
147° 


Hint 


