What are the four Inventor base environments and the file extensions names?

The four Inventor base environments are Part, Assembly, Drawing, and Presentation. The file extensions for these environments are as follows: Part files use the .ipt extension, Assembly files use the .iam extension, Drawing files use the .idw or .dwg extensions, and Presentation files use the .ipn extension. Each environment serves a specific purpose in the design and documentation process within Autodesk Inventor.