阅读理解
Are you good with children? Do you like children? Do you have time in the afternoon?
We need a babysitter for our son. He's five years old. The working time is from Monday to Friday, 3:00 p.m to 6:00 p.m.: pay(薪水) is$ 5 an hour.
We need help with: Looking after our son, reading to him, playing with him.
You must work at our house. We live in Fourth Road, near Huaxing Clothes Store. Please call Mr. Wang at 010-58899333.
和
都是等腰直角三角形，
交
于点
分别交
于点
和
的数量和位置关系，并说明理由.
