问JJ 图型题

问怎么看出水龙头外切小正方形的? 多谢

1.      DS: (General meaning, not accurate) There are one garden and four water faucet, can the four water faucet cover the whole garden?

1)      The garden is 32 square centimeters.

2)      The radius is 2 centimeters.

C  花园为边长4倍根号2的正方形，等分为4个小正方形，每个水龙头外切每个小正方形，刚好覆盖。