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Activity
Wolfram Research

Wolfram Math World: Tree

For Students 9th - 10th
The mathematical description of a tree, with examples as a graph and as a data structure.
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Handout
Wolfram Research

Wolfram Math World: Tree Leaf

For Students 9th - 10th
Here is a description of tree leafs, with a table of data.
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Handout
Wolfram Research

Wolfram Math World: Tree Spread

For Students 9th - 10th
This site offers a very brief description of tree spread.