Fixed typos in presentation

presentation/presentation.md

@@ -46,14 +46,14 @@ Types of content
 - Sections, subsections, paragraphs
 - Math: both inline and standalone
 - Figures and tables
-- References (bibiolgraphy)
+- References (bibliography)
 - Appendices
 
 ## Document structure
 
 - Preamble
 - Frontmatter - title, table of content, list of figures/tables
-- (The acutal) Document
+- (The actual) Document
     - Sections/Chapters
         - Text
         - Math
@@ -125,7 +125,7 @@ Usually specified in the text with:
 - Headings
     - `\section`, `\subsection`, `\subsubsection`
 - Paragraphs
-    - Just add some linebreaks!
+    - Just add some line-breaks!
     - An empty line signifies the boundary between paragraphs
 - Lists
     - `itemize`: bullet points
@@ -210,7 +210,7 @@ better choices than you.
 - Lengths may be **negative**
 
 
-## Defualt/documentwide lengths and widths
+## Default/documentwide lengths and widths
 
 - `\parskip`: space when skipping to next paragraph
 - `\parindent`: indent space on the first line of a paragraph