What are the 3 types of formal outline?

The three types of formal outlines are the topic outline, sentence outline, and paragraph outline. A topic outline uses short phrases or single Words to represent main ideas and subpoints, while a sentence outline consists of complete sentences for each point, providing more detail. A paragraph outline goes further by summarizing each section in paragraph form, offering a comprehensive overview of the content. Each type serves different purposes in organizing and structuring written work.