Websites: GEOMETRY

http://www.mathleague.com/help/geometry/polygons.htm#polygon

http://www.math.com/school/subject3/lessons/S3U2L1GL.html

Geoboard online to create polygons/triangles

http://standards.nctm.org/document/eexamples/chap4/4.2/part2.htm

Polygon Playground

http://www.mathcats.com/explore/polygons.html

Lesson to practice polygons

http://www.aaamath.com/B/geo318x4.htm

Naming Polygons and Polyhedra (based on the number of sides. 

http://mathforum.org/dr.math/faq/faq.polygon.names.html

TERMS definitions and descriptions of Geometric shapes and Polygons

http://www.mcwdn.org/Geometry/Polygons.html

http://www.georgehart.com/virtual-polyhedra/polygons.html

Cynthia Lanis

http://math.rice.edu/~lanius/Geom/pol.html

Lesson on Perimeter of Polygons

http://www.mathgoodies.com/lessons/vol1/perimeter.html

Spark Notes

http://www.sparknotes.com/math/geometry1/polygons/section1.html

Interior angles of polygons

    http://www.coolmath.com/interior.htm

Summary notes from Glenco Geometry

http://www.e-zgeometry.com/class/class10/10.1/10.1.htm

Wikipedia

http://en.wikipedia.org/wiki/Polygon

Math is fun:

http://www.mathsisfun.com/shape.html

 Math steps:  Progressive math

http://www.eduplace.com/math/mathsteps/3/a/index.html

Complementary angles

http://en.wikipedia.org/wiki/Complementary_angles