[url=https://www.dropbox.com/s/6itlcw3vgk2praw/01b_%E5%B8%B8%E8%A6%8F%E7%9A%84%E5%9B%9B%E9%82%8A%E5%BD%A2.doc?dl=0]01b_常規的四邊形.doc[/url]