You are viewing a single comment's thread from:RE: Determine the radius of the earth with one protractor and three polesView the full contextsteemitinland (52)in Zero to Infinity • 3 years ago You have been upvoted by @steemitinland. You can support us by delegating your idle sp. You can delegate in our community by clicking through these links. 50 SP100 SP500 SP1000 SP 1500 SP2000 SP3000 SP4000 SP Join With us in Discord Server