Websites provides instructions how to build the dome house from the timber. You can choose the dome size or the connection type. Just add the numbers and everything will be calculated automatically. You will be provided the scheme with all numbers and edges. Just take the timber and happy building! Have some links to external websites, but some of them do not work and they are not aggressively promoted.
I would not consider something as trade-free if it advertises some websites where you can buy something for a couple thousand dollar in a obvious manner: https://www.directory.trade-free.org/wp-content/uploads/2020/11/cERFjyg.jpg – it’s the same like duckduckgo (https://www.directory.trade-free.org/rejected/duckduckgo/) or startpage which might not collect your data, but have ads on their search result. Furthermore google analytics is used on the website: https://www.directory.trade-free.org/wp-content/uploads/2020/11/oUUtVGl.jpg