Big thank you to NASA for allowing the use of its images for our education
Okay so we will use the (quickly Googled) ‘fact’ that Earth’s diameter is about 12 742Km.
TIDBIT: If you measure around the equator, Earth’s diameter is actually about 21Km greater than measured through the Poles, because the Earth is a huge spinning ball of molten metal that bulges out as it spins like a water-filled balloon!
Also we can use that the Moon’s diameter is about 3474Km
And I’m going to advise you to use my favourite software for this kind of visual modelling problem, Geogebra. Or maybe your brain works better than mine!
FYI this beautiful photo was taken by the Earth Polychromatic Imaging Camera ( truly “EPIC” ) on NASA’s DSCOVR satellite. Nice work everyone!