polygons closed figure made up of line segments concave polygon-can have reflex angles :one or more...
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PolygonsClosed figure made up of line segments
Concave Polygon-can have reflex angles :One or more angles greater than 180
o
Convex Polygon-all angles greater than 0o and less than 180
o
Regular Polygons
Polygon with all sides congruent and all angles congruent
Special Regular Polygons
Equilateral triangle
Square
Quadrilateral Polygon with four sides
quadrilateral
trapezoid parallelogram
rectanglerhombus
square
kite
Total Degrees in Polygons
Figure Sides
3 # of triangles
1 x 180 =
Total degrees
1800
4 2 x 180 = 3600
5 3 x 180 = 5400
180
180
180
180
180
180
Angle Measure Regular Polygons
What is degree measure of each angle of a regular polygon?
Total degrees = ??A
B C
D
E
Degrees = ???
ABCDE 1080
5400
Angle Measure Regular PolygonsEquilateral triangle = 1800 Measure each angle = 600
Square = 3600 Measure each angle = 900
Angle Measure Regular Polygons
Regular Hexagon = ?? Measure each angle = ??Regular Octagon = ?? Measure each angle = ??