In this post, we will learn how to create a TikZ triangle node shape, change its size, its angles, its color and access to all its anchors. Unlike the circle shape, this one requires loading shapes.geometric TikZ library. 

What is the easiest way to draw a rectangle on latex? I just need a simple rectangle for my students to enter the final answer of a question and I am hoping I don't have to learn anything fancy like Tikz.

In this step-by-step tutorial, we will learn how to draw trees in LaTeX using TikZ package.

Trees as a data visualization tool

Tree diagrams are used to represent hierarchical information, which means there is a root and all the other information in the data can be shown in relation to that root. It is like the root is the base of our tree and all other information are its branches and leafs (nodes).

All trees consist of nodes and branches. Nodes hold the data and branches represent the connections between nodes. Tree structures usually have a node that has no parents—it is called the root node. All other nodes have a parent node, which is a node one step higher in the hierarchy. When there is a directly connected one step lower node, it is called a child node. And nodes that share the same parent are called sibling nodes.

Trees can be used to show the members of a family, data structures, outlines, evolutionary relationships, organizational structures, playoff brackets, and many more types of data.