Geometry Chapter 7

triangle

triangle

3 sides

quadrilateral

4 sides

pentagon

5 sides

hexagon

6 sides

septagon (or heptagon)

7 sides

octagon

8 sides

nonagon

9 sides

decagon

10 sides

elevenagon

11 sides

dodecagon

12 sides

equation for: sum of interior angles of a n-gon

(n-2)180

equation for: one interior angle of a regular n-gon

(n-2)180

n

sum of exterior angles of any convex polygon

360 degrees

equation for: one exterior angle of a convex polygon

360/n

equation for: finding the number of sides

360/exterior angles