| A | B |
|---|
| heptagon | any polygon that has 7 sides and angles |
| octagon | any polygon that has 8 sides and angles |
| nonagon | any polygon that has 9 sides and angles |
| decagon | any polygon that has 10 sides and angles |
| dodecagon | any polygon that has 12 sides and angles |
| vertex | the common point of 2 sides of a polygon |
| diagonal | a line segment, OTHER THAN A SIDE, that connects 2 vertices of a polygon |
| line segement | part of a line ( It has a beginning point and an ending point) |
| line | a straight path of points that never end |
| congruent | having the same measures; equal |
| adjacent | next to each other |
