Ok. The flat earth society finds it better to research information yourself rather than getting it directly from a source. That's why you can find different numerical values here.
The distance of the moon is found by calculating the distance of the sun. Because the distance of the sun is considered the same as the distance of the moon, and the diameter of the sun is considered the same as the diameter of the moon. I used the expression "confirmed" because we did not go to the moon and since we deny that we went to the moon, we can only find this by calculation.
If you consider that the world is flat, the distance and diameter of the sun are determined based on the shadow angles of the sun in any two cities.
There are many studies done on this subject, and one of them is in one of my threads in the believers section. That's why I suggested you search. Since you couldn't find it, I'll give you as much information as I remember. Honestly it should be in there somewhere.
Most flat earth researchers calculate the distance between the sun and the moon from the earth as 3000 miles. I calculated it a little closer than this, but I stated that this value could be acceptable. The diameter of the moon and the diameter of the sun (if I remember correctly) are 50 kilometers. If I remember incorrectly it could be 5 kilometers. I need to check my page to confirm. Since you're not looking, I'm not looking either. You can find it if you try again by selecting my posts in the search options. If you search by typing username as a member in the search option in the member messages search options, you will see the craziest theories.
good luck.