1. 1-6 Classify Polygons

2. 1-6 Classify Polygons Polygon – a closed shape with segments only.
Equilateral – all sides are equal.
Equiangular – all angles are equal.
Regular – all sides and angles are equal.

3. 1-6 Classify Polygons Concave Convex “points inside” “round” Hexagon

4. 1-6 Classify Polygons # of Sides Name 3 8 4 9 5 10 6 12 7 n Triangle
Octagon 4
Quadrilateral 9
Nonagon 5
Pentagon 10
Decagon 6
Hexagon 12
Dodecagon 7
Heptagon n
n-gon

5. 1-6 Classify Polygons Practice:
(9x + 5)o and (11x – 25)o represent two angles in a regular octagon. Find an angle measure of the octagon.

6. Practice: Each figure is regular. Find x.
1-6 Classify Polygons
Practice: Each figure is regular. Find x. 1.
x2 + x
x2 + 4