2. Polygons Section 1-6

3. polygon – a many-sided figure convex polygon – a polygon such that no line containing a side of the polygon contains a point in the interior of the polygon.

4. convex concave

5. 3 sides: triangle 4 sides: quadrilateral 5 sides: pentagon 6 sides hexagon 8 sides: octagon 10 sides: decagon n sides: n-gon

6. diagonal – a segment joining 2 nonconsecutive vertices of the polygon When referring to a polygon, list its consecutive vertices in order. A B C D E F

7. Theorem 2-13 The sum of the measures of the angles of a convex polygon with n sides is

8. Theorem 2-14 The sum of the measures of the exterior angles of any convex polygon, one angle at each vertex is 360.

9. regular polygon – a polygon that is both equiangular and equilateral

10. Joke Time Where do math teachers go on vacation? To Times Square

11. Why did the foal cough? Because he was a little horse!