btw isnt it ishworlal sir's POTYAK name was because of his potato shaped belly??? As far as I know, Protractor (geometry ma angle naapna use garne instrument) jasto semi-circular bhudi baata Protek hudai Potyaak ma apabhramsa bhaeko jasto lagcha. One of our classmates asked him "Sir, tapai garbhawati hunu bhaeko ho?" He looked very very upset with that question. He was a great teacher though, taught us in class 10.