The calculated length of the tree is 15.3
How to determine the length of the tree
From the question, we have the following parameters that can be used in our computation:
The figure
This figure is a right triangle
The length of the tree (x) can be calculated using the following Pythagoras theorem
x² = 8² + 13²
Evaluate
x² = 233
So, we have
x = 15.3
Hence, the length of the tree is 15.3