The chapter explains that triangles ABC and ADE are similar. Thus, ratio of CB to DE is equal to the ratio of BA to AD. Does this mean that
- if I look at the moon in the telescope that is 1 m long,
- and the moon appears to be (I will make up a number) 1 cm in diameter,
- knowing that the distance between moon and Earth is 384,000 km,
I can conclude that the moon is 3,840,000 m in diameter?
This is coming from
384,000 km / 1 m = X / 1 cm or, when converted to meters,
384,000,000 / 1 = X / 0.01