

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. 
120° 
B. 
135° 


C. 
90° 
D. 
108° 


Hint 


2. 
Which characteristic of a regular polygon is used to determine if it tessellates? 


A. 
The angle measure at each vertex is less than 180. 
B. 
The polygon has an even number of sides and angles. 


C. 
The angle measure at each vertex is a factor of 360. 
D. 
The sum of the measures of the angles is a multiple of 360. 


Hint 


3. 
The sum of the measures of the angles of a regular octagon is 1080°. What is the measure of each angle? 


A. 
144° 
B. 
120° 


C. 
135° 
D. 
108° 


Hint 


4. 
The sum of the angle measures of a regular dodecagon (a 12sided polygon) is 1800°. What is the measure of each angle of a regular dodecagon? 


A. 
150° 
B. 
100° 


C. 
144° 
D. 
140° 


Hint 


5. 
Which of the following angle measures represents the angles of a regular polygon that can be used to make a tessellation? 


A. 
60° 
B. 
140° 


C. 
108° 
D. 
144° 


Hint 


