Find out how tessellation is when shapes fit together in a pattern with no gaps or overlaps. Shapes with 4 sides Explore four-sided shapes looking at straight lines, curved lines and 2D shapes. What ...

'll try to make this as concise as possible... Saving/converting a .xls created with Excel 2003 to a .xlsm causes the ActiveX controls to all be renamed to something generic. e.g., Label1, ...