Mrs. Bird set-up her kindergarten classroom so that there was a right triangular area formed by the bookshelves, as shown in the picture below.
Note: Figure is not drawn to scale.
If bookshelf A is 3 feet long and bookshelf B is 4 feet long, what is the length of bookshelf C?
A.
5 feet
B.
7 feet
C.
6 feet
D.
8 feet