Question

对折长方形纸片ABCD,使AD与BC重合,得折痕EF,把纸片展开;再一次折叠纸片,使点A落在EF,并使折痕经过点B,得折

Answer 1

N应是A在EF上的交点

1.BN=AB

2.BE=0.5AB=0.5BN

3.∠BEN=90°

4.∠BNE=30°

5.∠ABN=60°

6.∠ABM=∠NBM=0.5∠ABN=30°

7.∠BMP=90°-∠NBM=60°

7.∠MBP=90°-∠ABM=60°

8.△BMP是等边三角形