根据句意及首字母提示完成单词
(1)I want to have two days o____ 
(2)Sally can h____  hear the traffic in the streets.
(3)I have told her the w ____  story.
(4)From the t____ of the mountain I can see the sea.
(5)We took a cable car to see the v ____  of the countryside.

量出下面各图形中每个角的度数，再填写下表．

你发现了什么？再任意画一个四边形试一试，你会得到结论吗？