What is the difference between a summary and an essay ?
how do i write a summary ? do i have to follow the same rules i used for an essay which is introduction, body and conclusion.
if you have extra ideas you would like to add, feel free to do so.

Ummarizing something is like paraphrasing it.

Making it smaller while still holding the general gist of something.

People generally summarize when they are taking notes.

An essay is a longer piece of work that is written on a topic from the author's point of view.

Greetings, Gary :)

So, I was always told that an essay usually had to contain more than three paragraphs, whereas a summary had to be at least three sentences.

So, when writing a summary, you would not use the same rules as writing an essay, but they'd be pretty similar. In summary's and essays, you have to put down complete ideas and sentences, as well as having correct grammar.

For an essay, you have to write an introduction, body, and a conclusion, but for a summary, all you would have to do is write what the general idea is. 

*Remember to always use correct punctuation, because most professors and teachers take off points if they see incorrect spelling. 

~Hope I helped!~