http://www-k6.thinkcentral.com/content/hsp/math/hspmath/na/common/itools_pri_9780547584973_/main.html?module=geometricfigures&activity=4 (iTools:  Sides and Vertices)

 

http://www-k6.thinkcentral.com/content/hsp/math/hspmath/na/common/itools_int_9780547584997_/main.html?module=geometricfigures&activity=19 (iTools:  Polygons)

 

http://www-k6.thinkcentral.com/content/hsp/math/hspmath/na/common/mega_math_9780547585062_/megamathcd5/cm/launch.html?strActivityName=g36_2_1_D&strAssignID=1 (Polar Planes Level D)

 

http://www-k6.thinkcentral.com/content/hsp/math/hspmath/go_math_2012/na/gr5/amm_9780547665054_/lesson.html?g_iGrade=6&g_iChapter=91&g_iLesson=4&strUserID=st1&g_iProduct=5&g_iSection=15 (Polygons)