# Thread: Latex - prime factor tree

1. ## Latex - prime factor tree

Dear Forum,

I'm very new to Latex and trying hard to learn how present math documents for assessment.

Can anyone tell me how to display a prime factor tree? For example:

630 is 2x3x3x5x7 and I'd like to display the factors using arrows in a neat diagram.

Thanks in advance for any help.

2. ## Question

Have you read the LaTex tutorial?

3. Originally Posted by wonderboy1953
Have you read the LaTex tutorial?
The LaTeX tutorial doesn't show you how to do this .

Personally, I have no idea. My LaTeX learning so far has focused on typesetting text impeccably.

4. Originally Posted by Kcal
Can anyone tell me how to display a prime factor tree? For example:
It can be done using the package PGF.

Here is an example :
Code:
\documentclass{article}

\usepackage{tikz}

\begin{document}

\begin{figure}
\centering
\begin{tikzpicture}[
level 1/.style={sibling distance=20mm},
level 2/.style={sibling distance=10mm},
]
\node{80}
child{node {8}
child{node {2}}
child{node {2}}
child{node {2}}
}
child{node {10}
child{node {2}}
child{node {5}}
};
\end{tikzpicture}
\caption{Simple tree}
\end{figure}

\begin{figure}
\centering
\begin{tikzpicture}[
level 1/.style={sibling distance=40mm},
level 2/.style={sibling distance=20mm},
level 3/.style={sibling distance=10mm}
]
\node[rounded corners, draw]{720}
child{node [rounded corners, draw] {20}
child{node [fill=red!30,rounded corners] {2}}
child{node [rounded corners, draw] {10}
child{node [fill=red!30,rounded corners] {5}}
child{node [fill=red!30,rounded corners] {2}}
}
}
child{node [rounded corners, draw] {36}
child{node [rounded corners, draw] {6}
child{node [fill=red!30,rounded corners] {2}}
child{node [fill=red!30,rounded corners] {3}}
}
child{node [rounded corners, draw] {6}
child{node [fill=red!30,rounded corners] {2}}
child{node [fill=red!30,rounded corners] {3}}
}
};
\end{tikzpicture}
\caption{Elaborated tree}
\end{figure}

\end{document}