Your first or last presentation slides to angel investors should contain your contact information.
No later than Slide #2, your audience should know what your company does (at a high level). In some cases, a tag line on the cover slide can be sufficient.
The following topics are usually covered with various depth (details are suggestions). Arrange the order and the depth to best fit your company. You can use backups slides to cover all those areas during Q&A, as needed. Do not fall into the trap of focusing on your technology/product rather than your business. Investors want to understand their ROI and your business model, not just your product.