moon in the earth - 1

how big is the surface of the Moon?
well, we could simply say that is 38 million square kilometres (14,6 million square miles).
this is the real area of our satellite, but I think this is not easy surface to imagine.
so I simply found the radium of an imaginary circle of 38 million square kilometres.
the result is easy to find: the radium of this equivalent area of the Moon is exactly 3.480 km
that means that a surface as big as the area of all the spherical ground of our satellite is approximately like this:

this grey area is not equivalent to the visible side of the Moon we are used to.
this grey surface is the equivalent of the entire satellite ground including the visible and the invisible side.