Answer: linear diameter
The linear diameter of moon is 3754 km.
Step-by-step explanation:
Moon is the only satellite of earth. It doesn’t produce light on its own but reflects the light of sun and appears lighted up. The diameter of moon can be found out using parallax method.
In parallax method moon is observed through a telescope from a point on earth the angle θ between the diameter of the moon and this point on earth is measured. This angle is mathematically equal to the ratio of diameter D of moon and the shortest distance S between moon and earth.
Thus diameter of moon can be calculated by finding the product of the distance between moon and earth and the angle.