1. Polygon - a 3 or more sided closed figure
POLYGONS
Polygon
- a 3 or more sided closed figure

2. POLYGONS Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon 3 -
4 -
5 -
6 -
7 -
8 -
Triangle
Quadrilateral
Pentagon
Hexagon
Heptagon
Octagon

3. 9 -
10 -
11 -
12 -
n -
Nonagon
Decagon
Hendecagon
Dodecagon
n-gon

4. Area of Polygons
Area - space inside
Area is always measured in square units (A=24 units squared or 24 square units)
Congruent figures have congruent areas.

5. Parallelogram – Rectangle – Square – Triangle - A – bh A = bh
h is the perpendicular distance between the bases
A = bh
A = s2 or bh
1/2bh
Parallelogram –
Rectangle –
Square –
Triangle -

6. Trapezoid –
Rhombus –
Circle -
½ h(d1+ d2)
½d1d2
r2

7. Regular Polygons - A=1/2Pa
P - perimeter
a - apothem
-a segment from the center perpendicular to a side.