

1. 
Choose the best description for the figure. 





A. 
regular polygon 
B. 
not a polygon 


C. 
semicircle 
D. 
polygon 


Hint 


2. 
The sum of the measures of the angles of a regular octagon is 1,080°. Find the measure of one of its angles. 


A. 
135° 
B. 
108° 


C. 
90° 
D. 
120° 


Hint 


3. 
By drawing triangles, you can find that all of the measures of the angles in an octagon add up to 1080°. Find the measure of one angle in a regular octagon. 


A. 
135° 
B. 
1080° 


C. 
1072° 
D. 
150° 


Hint 


4. 
In the tessellation below, name the polygons and determine how many of each type are at each vertex. 


A. 
none of the other choices; different vertices have different polygons forming them 


B. 
two triangles and two hexagons 


C. 
one hexagon and four triangles 


D. 
six triangles 


Hint 


5. 
In the tessellation below, name the polygons and determine how many of each type are at each vertex. 


A. 
one hexagon and four triangles 


B. 
six triangles 


C. 
two triangles and two hexagons 


D. 
none of the other choices; different vertices have different polygons forming them 


Hint 


