[hindi] Development of latarel surface : Square pyramid 1

question : A square pyramid of 40mm edge of base and 60mm axis height has its base in the H P with edge of base equally inclined to the V P. Draw the development of lateral surface of the pyramid Shooting: For video I use MI 3 mobile phone (xiaomi) For audio I use blue snowball mw condensor mic EDITING: for video I use Sony vegas pro for audio I use Audacity. I hope you like it. for more videos subscribe to my youtube channel. thankyou for watching