https://padlet.com/izatt7/vqnditlk2knd Instruction: Answer the question below by click on Add Comment en-us 2017-08-14 01:05:48 UTC 2024-05-27 23:11:05 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Playcontrol.png izatt7 https://padlet.com/izatt7/vqnditlk2knd/wish/180858910 What is the function of plane mirror in periscope?]]> 2017-08-14 01:08:36 UTC https://padlet.com/izatt7/vqnditlk2knd/wish/180858910 izatt7 https://padlet.com/izatt7/vqnditlk2knd/wish/180859879 2017-08-14 01:25:00 UTC https://padlet.com/izatt7/vqnditlk2knd/wish/180859879