Jay has an album that holds 900 photos. Each page of the album holds 9 photos. If 64 % of the album is empty, how many pages ar
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If a pentagon is regular, then all of the sides are the same length. This means that
So, if , the lengths of the sides evaluate to
So, all the sides of the pentagon are 21 units long, and AB is 21 units long as well, because all sides are the same length.