Some tests for Degree and Intersect

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23942 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for Degree[number] [neeeds backport]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@23943 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e