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### Drawing a Circle without a Compass or Protractor

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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
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```
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

Put your thumbnail down on the paper.  Now angle the pencil so the

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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Associated Topics:
Middle School Conic Sections/Circles
Middle School Geometry

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