How to calculate the length of a hip rafter

How to calculate the length of a hip rafter and the area of a hipped roof.
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In this video I go through step by step what to do to calculate the length of a hip, then a common rafter, and then the area of the roof. You can use this area information to work out how many tiles you need to order, and get the right amount of battens and felt.

The difficulty with a hipped roof is that the hips slope in two different directions at the same time. So even if you have a CAD drawing, there is no way to measure it. Here I show you a method using simple maths (Pythagoras), to keep things simple and do the calculation easily.

For my popular video on how a hipped roof works:    • How does a hipped roof work?  

This video was sponsored by Brilliant.