A. mango B. socks C. dog D. doll E. under the desk
F. hamburger G. grapes H. play football I. horse J. fruit salad
如图甲,四边形ABCD是等腰梯形,AB∥CD.由4个这样的等腰梯形可以拼出图乙所示的平行四边形,则四边形ABCD中∠A度数为 ( )