题目如图,∠B=∠D=90∘\angle B=\angle D=90^{\circ}∠B=∠D=90∘,AB=ADAB=ADAB=AD,∠2=64∘\angle 2=64^{\circ}∠2=64∘,则∠1=\angle 1=∠1=____∘^{\circ}∘.知识点：平行线的性质章节：未标注
如图,,,,则____.如图,,,,则____.如图,,,,则____.