Drawing with TikZ

Drawing inside LaTeX

• You can draw diagrams with code using the TikZ package — no image files needed.
• Load it once, then draw inside a tikzpicture:

\usepackage{tikz}
...
\begin{tikzpicture}
  \draw (0,0) -- (2,1);
\end{tikzpicture}

• \draw (0,0) -- (2,1); draws a line from one point to another. Every command ends with ;.

Shapes and paths

• Chain points with -- to make any shape; cycle returns to the start:

\draw (0,0) -- (2,0) -- (1,1.5) -- cycle;   % a triangle
\draw (0,0) circle (1);                      % a circle, radius 1
\draw (0,0) rectangle (3,2);                 % a box

Why code a drawing?

• It stays sharp at any size (it is vector graphics, not a photo).
• It is exact — perfect for geometry, graphs, and circuit diagrams.
• Now draw your own triangle in the task.

Common mistakes

• Every \draw command ends with a semicolon ;.
• Wrap the drawing in a tikzpicture environment.