Question

yar mere ko aak chiz samaj nahi aati ki pehle ke indian or egipsian mathematicians ancient time me earth the approximatly sahi diameter or distence from sun to earth or bohot see chije kese pata laga lethe the are plss is qus to delete karane ke lia report mat karna

Answer 1

 What we actually measure is the distance from the Earth to some other body, such as Venus. Then we use what we know about the relations between interplanetary distances to scale that to the Earth-Sun distance
  hope this help...
cheers..!!