# Knowing that the Earth's diameter is about "3 2/3" times the diameter of the moon, what is the angular diameter of the Earth as seen by an observer on the moon?

##### 1 Answer

Feb 20, 2016

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#### Explanation:

You need a little more information, e.g. that the angular diameter subtended by the moon from Earth is about

Given this, the angular diameter of the Earth from the moon is approximately:

#31 * 11/3 = 341/3 ~~ 114'# or#1^@54'#