How do you get the diameter of Mercury?

Answer 1

You get it by multiplying the radius by 2 or dividing circumferance by 3

Answer 2

The diameter of Mercury can be measured using telescopes and imaging devices on spacecraft, such as NASA's Messenger mission. By studying images of Mercury and making precise measurements, astronomers can determine its diameter, which is approximately 4,880 kilometers (3,032 miles).

Answer 3

The distance from Mercury to Earth, which I assume is the question you are asking, is not a circle, so therefore, it does not have a diameter. The distance is about 77 million km