10. What is the measure of each interior angles of a regular 16-sided polygon?
a) 157.5
b) 180
c) 60
d)100
11. How many sides does a regular polygon have if each exterior angle is 45?
a) 15
b) 10
c) 12
d)8
12. What is the measure of each exterior angle of a nonagon?
a) 50
b) 40
c) 30
d)60
13) which of the following refers to the set of all points on a plane that are the same distance from the center?
a) circle
b)radius
c) diameter
d) chord​