Geometry Sites
Area and Perimeter
http://www.shodor.org/interactivate/activities/perm/index.html
http://www.shodor.org/interactivate/activities/permarea/index.html
http://www.shodor.org/interactivate/activities/perimeter/index.html
http://www.cut-the-knot.com/Curriculum/Geometry/AreaOfParallelogram.shtml
Using 3-d shapes and geometry
http://illuminations.nctm.org/imath/6-8/isometric/index.html
Making and viewing shapes
http://illuminations.nctm.org/imath/3-5/GeometricSolids/student/GeoSolids4.html
How to measure an angle:
http://ambleweb.digitalbrain.com/ambleweb/ambleweb/ambleweb/mentalmaths/protractor.html
Area and Circumference
http://harcourtschool.com/activity/elab2002/grade_6/018.html
Transformations
http://www.shodor.org/interactivate/activities/transform/index.html
http://ambleweb.digitalbrain.com/ambleweb/ambleweb/ambleweb/mentalmaths/protractor.html
symmetry
http://ambleweb.digitalbrain.com/ambleweb/ambleweb/ambleweb/mentalmaths/protractor.html
Measuring angles
http://www.shodor.org/interactivate/activities/transform/index.html