Drawing a Circle without a Compass or Protractor
Date: 3/23/96 at 21:2:33 From: Anonymous Subject: circles My teacher has asked us to find out how to draw a circle without using either a compass or a protractor. How do I do this? I am in 6th grade.
Date: 3/28/96 at 23:12:55 From: Doctor Steven Subject: Re: circles Here's how I draw a circle when I don't have a compass or protractor. Basically the idea is to use your hand as a compass. Your thumbnail is the pointy part of the compass and the end of the pencil is (you guessed it) the end of the pencil part on a compass. Pick up the pencil as if it were dirty, picking it up between your index finger and your thumb. Put your thumbnail down on the paper. Now angle the pencil so the lead touches the paper. Now rotate the paper keeping your thumb stationary (and so the pencil is stationary also). If you go all the way round, the lead of the pencil should trace out a circle. This circle isn't so exact, but close enough for all practical purposes. Enjoy. -Doctor Steven, The Math Forum
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