Here are some few links related to my topics:

http://www.regentsprep.org/Regents/math/geometry/GG1/undefinedterms.htm

http://donnelly15.tripod.com/id20.html

Oswego City School District Regents Exam Prep Center

http://www.mathleague.com/help/geometry/angles.htm

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

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

http://www.analyzemath.com/Geometry/congruent_triangles.html

http://www.andrews.edu/~calkins/math/webtexts/geom14.htm

http://regentsprep.org/Regents/math/math-topic.cfm?TopicCode=rtritrig

http://library.thinkquest.org/C0110248/geometry/menareacircle.htm

http://regentsprep.org/Regents/math/quad/LQuad.htm

http://www.mathopenref.com/rhombus.html

http://www.runet.edu/~wyang/MAPLE/java/java/midshkk/midshkk.html