大堂
A:hall
B:ball
C:tall
Let's ask the teacher for help. She ________ the answer.
矩形纸片ABCD的边长AB=8,AD=4,将矩形纸片沿EF折叠,使点A与点C重合,折叠后在某一面着色(如图),则着色部分的面积为( )
下列说法正确的是( )