January 26, 2016
Tuesday
1/26/16
Polygons
Assigment: Handout
January 26, 2016
Polygon
January 26, 2016
Convex Polygons
Concave Polygons
January 26, 2016
Naming polygons
We name polygons by the number of sides they
have.
Number of Sides Name of Polygon
3
4
5
6
7
8
9
10
n
triangle
quadrilateral
pentagon
hexagon
heptagon
octagon
nonagon
decagon
n-gon
January 26, 2016
equilateral polygon
equiangular polygon
regular polygon
January 26, 2016
Name these polygons by their sides, whether
they are regular or irregular, and whether they
are convex or concave.
January 26, 2016
January 26, 2016
Find the Area and the Perimeter
B(2, 7)
B
A
A(-6, 3)
C(5, 3)
C
January 26, 2016
A (-2, -4) B (1, 3) C (4, -4)
length of AC = 6
length of AB
length of BC
height = 7