A photo graph of a full moon is enlarged so that the diameter appears 3 times larger how much larger does the circumference of the moon appear

3

Step-by-step explanation:

Circumference is distance round a figure. When diameter is trippled, the circumference will also tripple.

Here is a proof

Take the moon to have circular shape and has diameter d

Circumference is given by C=πd

When the new diameter is trippled, diameter will be 3d and the new circumference will be

C=π3d=3πd

Evidently, the new circumference is three times the original circumference. Therefore, for this case, the new circumference will be 3 times the original

it would open into a square depending on the type of envelope i’m not sure about the second part