Polygon was derived from two Greek words “poly” and “gon”. If “gon” means “angle”, what does “poly” mean?

• many

• ray

• segment

• vertex

What polygon is the figure at the right?

• convex polygon

• nonconvex polygon

• regular polygon

• none of the above

What do you call a polygon with 11 sides?

• decagon

• nonagon

• dodecagon

• undecagon

What is the sum of all interior angles of a nonagon?

• 1360°

• 1260°

• 1160°

• 1060°

The sum of all interior angles of a polygon is 1080°. How many sides does this polygon have?

• 8

• 9

• 10

• 11

What is the other term for nonconvex polygon?

• concise polygon

• concave polygon

• concurrent polygon

• none of the above

What closed figure is joined by three or more coplanar segments which intersect at endpoints?

• angle

• circle

• polygon

• prism

Which of the following is NOT a convex polygon?

• 
• 
• 
• 

What is the sum of all interior angles of a decagon?

• 1540°

• 1440°

• 1340°

• 1240°

.How many sides does a polygon have if the sum of its interior angles is 1980°

• 13

• 14

• 15

• 16