1. A closed plane figure with at least 3 sides.
Each side intersects two other sides, one at
each endpoint, so that no two sides w/ a common
endpoint are collinear.
The line segments that form a polygon.
The point where two sides of a polygon meet.
A polygon that doesn't contain a point in
the interior of the polygon. All interior angles
are less than 180°.

2. A polygon with at least on point in the interior. At least
one angle greater than 180°
A polygon with n number of sides.
20-gon is a polygon with 20 sides.
All sides are congruent.
All angles are congruent.
All sides and angles are congruent.

3. polygon
sides
two
collinear
vertex

4. not a polygon
convex polygon
concave polygon

5. This isn't a polygon because
it's not made up of line segments only.
This is a convex polygon.

6. 8
regular polygon

7. congruent
5x x + 3 x 4 19

8. This polygon is a quadrilateral. It's not equilateral,
equiangular or regular.
m∠1 = m∠2
4x + 8 = 5x - 5
13 = x
m∠1 = 4x + 8
m∠1 = 4(13) + 8
m∠1 = 60°

9. 1st Period 7:00 – 7:06
2nd Period 7:12 – 7:18
3rd Period 7:24 – 7:30
4th Period 7:36 – 7:42
5th Period 7:48 – 7:54
6th Period 8:00 – 8:06
7th Period 8:12 – 8:16
8th Period 8:24 – 8:30